Malicious PDF — malware analysis report

Static analysis result for SHA-256 a404968e1f27aba4…

MALICIOUS

PDF

40.6 KB Created: 2020-08-22 07:01:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f49c28cc597c92c2cfa237c86b75f2ef SHA-1: 71992ae84d2370673969198763145d324ebb2e23 SHA-256: a404968e1f27aba4400f7cebdab0c0b13995c6fb5d9acb6c63c7d5823bc0d7a2
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. The document body, though heavily obfuscated, contains a reference to the same URL and mentions 'china visa application form from pakistan', suggesting a lure to trick users into clicking the malicious link. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDF files, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=china+visa+application+form+from+pakistan In PDF document text
    • http://files.siyaozheng.com/uploads/1/3/1/3/131382395/mupiwoxe.pdfIn PDF document text
    • http://pulotes.bestdealfitness.com/uploads/1/3/0/7/130775448/e79dae13.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/1/0433/7732/8278/files/84025150943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3645/8654/files/unix_shell_programming_tutorials_point.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2859/4336/files/jelidoga.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8745/2576/files/47646381859.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5493/0839/files/74982158961.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3704/0538/files/psychology_of_love_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1574/9281/files/vijapijavozobo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0126/6851/files/37318483912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9162/4096/files/wuferurava.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 2

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_off00006096.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6096 5284 bytes
SHA-256: 8a79132061e81b5ca561a6fc62e033adfb3cd19545846a419ab77c39562270f8
font_01_sfnt_off00007263.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7263 10308 bytes
SHA-256: 3eb5429d2ea84b70d370661d57f98cd48f98932d72e49cac54362bccbfae8b86

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