Malicious PDF — malware analysis report

Static analysis result for SHA-256 dc12758093f2ed1b…

MALICIOUS

PDF

39.0 KB Created: 2020-08-10 03:04:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 20fe0fb027d6943563dd14adfc1d4772 SHA-1: 006c3fdcc0d06a7c978b5a4d6658114517dec065 SHA-256: dc12758093f2ed1be7f74146c2121f5eba97e865f0bdc9362132aa964c2e47b9
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm and a malicious redirector, indicating an attempt to lead the user to a malicious site. The document body, though heavily obfuscated, contains text suggesting it is a PDF about exercises, likely a lure. The primary malicious URL identified is ttraff.cc, which is known for redirecting to further malicious content. No scripts were extracted, limiting the analysis of direct payload execution.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.cc/pify?keyword=simple+past+continuous+tense+exercises+with+answers+pdf In PDF document text
    • http://jamunebos.wcmmea.com/uploads/1/3/0/9/130969352/2512750.pdfIn PDF document text
    • http://files.goalliedathletes.com/uploads/1/3/1/4/131453623/tukodobafojazud-dutumefoxere-bapasu-guvexikuz.pdfIn PDF document text
    • http://files.svdp-alameda.org/uploads/1/3/1/0/131070009/vobolefakagives_kavawutulu_zuwoxo_moloma.pdfIn PDF document text
    • http://files.swisspastryonline.com/uploads/1/3/1/6/131636834/3c4a4b93.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/1/0431/6345/1549/files/miscreated_dedicated_server.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9993/9235/files/75005999135.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9450/6661/files/88108438025.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1679/8883/files/28841058571.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1804/4063/files/foxatanuwonopapuwopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7786/8443/files/67057242878.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2243/4972/files/jamidun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6498/1664/files/pubetesop.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2703/8359/files/jijovizoki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7574/7491/files/gumasurig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2051/7537/files/pussy_saga_cheats.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_off00005912.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5912 5660 bytes
SHA-256: 9fbed8e11b98b6dd5a5151c1f2e86d1be42ac941ecff2ebde7eb4cc0be318611
font_01_sfnt_off00006c3c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6C3C 10060 bytes
SHA-256: 24b25bb0d893e4f6997b6e7ec86f33d7fcf98671f8b8619e44769a20326c7de5

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