Malicious PDF — malware analysis report

Static analysis result for SHA-256 7a1bb21d5e492672…

MALICIOUS

PDF

211.3 KB Created: 2020-08-23 18:59:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 21e38ce7e59fb06c682aa5b84b0b4b84 SHA-1: f25f4cbb4e0971e45dcd3409816eea933edf94f6 SHA-256: 7a1bb21d5e49267289508efef515988bbfa478a2d27b37078e3b052e68a04b6c
134 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, identified by heuristics as a redirector for SEO-based phishing. The document body, though heavily obfuscated, contains the target URL, suggesting an attempt to trick users into downloading malicious content or visiting a compromised site. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9996

Heuristics 4

  • 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.
  • 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/pify?keyword=astm+standards+pdf In PDF document text
    • http://files.labeldogshippingsupplies.com/uploads/1/3/0/8/130873728/8847f54207.pdfIn PDF document text
    • http://noxem.carnivalincovington.org/uploads/1/3/2/6/132682076/vukebu.pdfIn PDF document text
    • http://files.acutepuncture.com/uploads/1/3/0/7/130775002/f26b0046171.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3702/4668/files/88960870920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1667/5740/files/dsm_5_bipolar_1_disorder.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2330/9727/files/78757669332.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6420/5216/files/26693168294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/2100/7005/files/jurnal_atavisme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/pdf_to_word_i_love_converter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7335/5424/files/grafica_de_pastel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/9371/6121/files/varanomoni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/45954226254.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0002f007.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2F007 2900 bytes
SHA-256: c4c77de79185a6e32b969612b4158c72aca0a6965e648bc7cf893bc7a336abbf
font_01_sfnt_off0002fa61.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x2FA61 5144 bytes
SHA-256: 98fb72794477b5dd428b5e0f1b8424b94b2ab63c08d50015c79d7eabe24dfced
font_02_sfnt_off00030bc2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30BC2 16652 bytes
SHA-256: c703634b5dda5791be09cf47191ffb291ae4af7ab69e488a16f5b7a96b9a17ef

Open this report in the interactive analyzer, or submit your own file for analysis.