Malicious PDF — malware analysis report

Static analysis result for SHA-256 3e840be7b7d1a258…

MALICIOUS

PDF

42.1 KB Created: 2020-08-11 01:35:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 9683dca68e7d0fd0647e59bbac1feca0 SHA-1: c1f381f4b53db3f7a1043f0ae4db7595b2aba925 SHA-256: 3e840be7b7d1a25842c3f79684fa4a41432d713ea3940685b84cc1112d4cf275
194 Risk Score

Malware Insights

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

The PDF file contains a link to a known malicious redirector, ttraff.ru, which is presented to the user as a 'common core state standards pdf'. This indicates a phishing or social engineering attempt to direct the user to malicious infrastructure. The file also contains a large number of links to external PDFs hosted on Shopify, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, and the document body is heavily obfuscated.

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/pify?keyword=common+core+state+standards+pdf In PDF document text
    • http://files.heat-shield.info/uploads/1/3/0/7/130738841/3312676.pdfIn PDF document text
    • http://files.coachhousecochins.com/uploads/1/3/1/0/131069764/1825010.pdfIn PDF document text
    • http://files.caseyscurbside.com/uploads/1/3/0/9/130969656/kotow_vebowul_pifojuruvefile_valeme.pdfIn PDF document text
    • http://files.northernjigs.ca/uploads/1/3/1/4/131438667/wujusonen.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/1/0428/1306/3327/files/40414823892.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3314/0127/files/zeweretufifijogewamo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1459/4464/files/auto_repair_dummies.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0245/files/76707810827.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1044/8798/files/guludo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2259/7796/files/33321508906.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9617/8845/files/diffraction_grating_spectrometer_experiment.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0094/5048/files/absolute_rc_plane_sim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5441/4494/files/jail_brake_minecraft.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7669/7760/files/tutorial_after_effects_cc_2020_espaol.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_off00006828.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6828 5172 bytes
SHA-256: c79e825a6b2d9d0b2f6218cf620e8083562a00e15a7eefa62c0b421c7a4585b1
font_01_sfnt_off0000799c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x799C 10104 bytes
SHA-256: 9db7679dd7554f9d3fbb1358765ec4c0f3dd96fd98495f2bb4e54e2ba80db103

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