Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acd206414951ff5…

MALICIOUS

PDF

50.8 KB Created: 2020-07-12 20:47:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2020-09-24
MD5: b568102eb3cc68c679da63832df48062 SHA-1: 38143d03c43949e5d0316e28760253e67aa836f6 SHA-256: 0acd206414951ff55045d1a0c068eb2a47eafd2789f9c7094545e570ca12c4b7
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to external resources, many of which point to redirector infrastructure. The primary redirector URL, 'https://ttraff.ru/wb?keyword=c%20language%20technical%20questions%20and%20answers%20pdf', is flagged as malicious. This suggests the document is designed to lure users into clicking these links, likely leading to a phishing site or malware download. The ML classifier also strongly indicated maliciousness.

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.ru/wb?keyword=c%20language%20technical%20questions%20and%20answers%20pdf In PDF document text
    • http://files.huntersvillepres.org/uploads/1/3/1/4/131438443/1924aa32565007.pdfIn PDF document text
    • http://files.annafoxryan.com/uploads/1/3/1/4/131483267/8915316.pdfIn PDF document text
    • http://files.antoniodavidsinopoli.com/uploads/1/3/0/8/130873907/4090271.pdfIn PDF document text
    • http://files.rqgenesis.co/uploads/1/3/2/3/132303023/wadelanuzosidubobu.pdfIn PDF document text
    • http://files.nokillhuntsville.com/uploads/1/3/1/4/131455883/jalupi.pdfIn PDF document text
    • http://files.mistergteacher.com/uploads/1/3/0/8/130873997/ea1710b61be90.pdfIn PDF document text
    • http://files.fatimaschool.org/uploads/1/3/1/4/131453018/lasixobu-kezitezize-zimaminesix-bovudipaduvav.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://rodawewek.files.wordpress.com/2020/06/famasufamaradujefatewadi.pdfIn PDF document text
    • https://livegino.files.wordpress.com/2020/06/96077529494.pdfIn PDF document text
    • https://wezivederij.files.wordpress.com/2020/06/vesejunuxo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/3537/0407/files/39965748288.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8307/1650/files/91996345607.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/womonevixaxijebuvi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/42382720611.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4440/5397/files/baxejefejodufarenabipo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/zixazudubebadige.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 8

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000086d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x86D9 5540 bytes
SHA-256: 429a5ce0b562506f05a5fb8378b59916091a7886c5ad13ae4f39b8e2c8721da1
font_01_sfnt_off000099b5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99B5 10520 bytes
SHA-256: de3fe80eb3c50e1c6a7f2adea6243b40b208a288283549d06b6414f145f7b752

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