Malicious PDF — malware analysis report

Static analysis result for SHA-256 8fea3e270c7dacfb…

MALICIOUS

PDF

39.5 KB Created: 2020-08-25 05:03:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: dc6744ebe7281923f3d2e86bfe31de63 SHA-1: 8898bd40f5a41d0a76ea28d11e2355237adf901e SHA-256: 8fea3e270c7dacfb90430613e3f339e9a87df6ee5c53a4c0558d6443b5dec2ed
194 Risk Score

Malware Insights

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

The PDF contains a link farm with 15 external links, including a critical redirector to 'ttraff.ru'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=attendance+form+deped', suggesting a lure to disguise malicious redirection. 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/pify?keyword=attendance+form+deped In PDF document text
    • http://files.northbristolrfc.co.uk/uploads/1/3/0/7/130740551/gabax-gelogunalimarod-josulo-dinenifeka.pdfIn PDF document text
    • http://bobimeda.stchrislocker.com/uploads/1/3/1/4/131437622/2b7c853921881.pdfIn PDF document text
    • http://wekuruja.runtuffborzoi.com/uploads/1/3/0/9/130969059/vekuti.pdfIn PDF document text
    • http://files.greenvilletrackclub.com/uploads/1/3/0/7/130738875/bidobesewubev_manajiveb_xonir_rozexaxe.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/1/0433/9315/5230/files/a_christmas_hallelujah_chords.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8713/3860/files/3008322008.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5070/2750/files/12758916786.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2756/9576/files/rutitemowowusi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1582/3772/files/sedabetegaraxikabinedufup.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4136/6951/files/xavegojemiwubajawusuletim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9114/8454/files/axial_scx10_2_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9314/8313/files/zabeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9699/0105/files/3252751864.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7206/8520/files/broiler_feed_formulation_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8638/1210/files/purikoduguwokevi.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_off00005e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E74 5080 bytes
SHA-256: 5b9c1bc495217d1ded12f95c719933ed64b67644dcb11779d7ef3ba2c2fa86f8
font_01_sfnt_off00006f9f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F9F 9956 bytes
SHA-256: 87d346cca5979fcd4aa67509ba88a67814a4238ff18f3e27d609fb014b8b6692

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