Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f29baa4d6172b72…

MALICIOUS

PDF

45.9 KB Created: 2020-10-23 03:50:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: febae2271f1be433c82bb2dce19ecbc3 SHA-1: 90f746d4226279f8744f3ac642c38ee7135252f8 SHA-256: 8f29baa4d6172b726fafd7e8ded5bb9b7ad0d612f921a101f19158c3467ef668
194 Risk Score
Tags
free-cdn-ebook-manual-lure

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains numerous links, many pointing to a redirector service, indicating a link farm or SEO poisoning tactic to lure users. The primary malicious link, 'https://ttraff.link/123?keyword=tavola+periodica+pdf+bianco+e+nero', is flagged as a malicious redirector. While no scripts were explicitly extracted, the PDF structure and embedded links strongly suggest an attempt to redirect users to malicious content, likely for phishing or malware distribution.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • PDF links to known malicious redirector infrastructure critical PDF_MALICIOUS_REDIRECTOR_LINK
    PDF contains a clickable URI to redirector infrastructure used by a known malicious PDF SEO/adware delivery campaign. These documents typically rely on user interaction and redirect chains rather than a PDF parser vulnerability.
  • Small PDF contains mass external PDF link farm critical PDF_SEO_LINK_FARM
    Small PDF contains many clickable external PDF links, mostly clustered on one host. This matches generated SEO/link-farm PDF carriers used to route users into malicious or unwanted-software delivery chains, rather than a normal document citation pattern.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • Embedded URL info EMBEDDED_URL
    One or more URLs were extracted from the document. The URL itself is not a detection — see the per-URL labels for which channel (macro, JS, link annotation, document body, ...) reached each URL.
    URL https://ttraff.link/123?keyword=tavola+periodica+pdf+bianco+e+nero In PDF document text
    • https://cdn-cms.f-static.net/uploads/4388820/normal_5f90fd893657d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f8a691c2bb03.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4372723/normal_5f8ab0bbd0c33.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4380705/normal_5f8f6cffb5b19.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0498/4841/8466/files/reniralazoguwazuvojod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3295/9912/files/subivimam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/5724/5077/files/85844136905.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0494/7217/6295/files/10729473146.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0463/1134/2242/files/dd_3.5_epic_mystic_theurge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6989/8909/files/82428713519.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0268/8391/5962/files/dumpster_apk_old_version_download.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/3b45abcb-888f-4424-ac6f-84fc15c438f2/english_file_pre_intermediate_workbook_answer_key.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/1c4902f8-f102-4268-8c08-45bab38d9202/ruger_p89_disassembly_manual.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/51140cec-5c34-4ef1-965a-39b3e8f7d85e/3866014787.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/17857d48-8cb8-4923-82d8-5a8dcfcb27e7/61047371350.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/aa45ae64-2cea-4fcd-af7c-ed10679c4c0c/77745499050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0492/7756/7132/files/28270255925.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/8250/9213/files/eliason_door_installation_instructions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7536/2198/files/6584443721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5281/2456/files/nisazutifunijo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/1022/7876/files/roe_47_job_vacancies.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000643d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x643D 4828 bytes
SHA-256: d741da1f64889de8fbcd4d439b1b77cbf1c8513636a10925532a925abff85e39
font_01_sfnt_off000074ab.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74AB 11672 bytes
SHA-256: 7de5aae1248eb106cfd8e3f98c0987e736e8aea19b211c7f72bf42d263d19045
font_02_sfnt_off00009a8f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9A8F 4324 bytes
SHA-256: 1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361

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