Malicious PDF — malware analysis report

Static analysis result for SHA-256 4bd311bfbbac65a5…

MALICIOUS

PDF

54.4 KB Created: 2020-08-07 08:58:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 70eea97c82e6584f72330d1c6a48c90a SHA-1: ecbb5f7fae5554e6799dd4f1e82dbe469c368a80 SHA-256: 4bd311bfbbac65a59e2cf97db92709c0b7e18d7e07d05068b941dd11c2cfe557
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external resources. One critical heuristic firing indicates a malicious redirector link to 'ttraff.ru'. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous links suggests a link farm or redirection strategy to obscure the ultimate destination.

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=moment+of+inertia+formula+pdf In PDF document text
    • http://bamejuzag.teachingandlearningnetwork.com/uploads/1/3/0/7/130776644/4452048.pdfIn PDF document text
    • http://files.nb-peiponyclub.com/uploads/1/3/1/3/131378942/sidepes_wisago_gotipudopitu_timizesanez.pdfIn PDF document text
    • http://files.helpabee.org/uploads/1/3/1/1/131164431/tozapajawozegavopiza.pdfIn PDF document text
    • http://files.nycea.org/uploads/1/3/2/6/132681303/putomibosaresa.pdfIn PDF document text
    • http://files.alexfullermedia.com/uploads/1/3/2/7/132710676/zanarun.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/1/0433/4914/7803/files/bunalonurudufo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2348/3548/files/ziwanuxu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2036/1629/files/raw_till_4_ebook.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6452/3926/files/26350436412.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/dawulivuwudanotalawuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/35873057739.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8865/0142/files/19287199526.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/4097/7574/files/saint_row_2_cheat_code_xbox_360.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9431/7981/files/initiation_au_bouddhisme_tibtain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2638/9912/files/zofikapok.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn 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_off000076a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 5012 bytes
SHA-256: 17b01765c495434cb027f55429501260a03f2d079cd370f87cb8039fa10325b9
font_01_sfnt_off000087a7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x87A7 15516 bytes
SHA-256: a668794114361c395e92754529af5d05992831d395c07af92ab89166137e8e05
font_02_sfnt_off0000b7b7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB7B7 16064 bytes
SHA-256: 1396562ca3b520584892f4bd50ff39b0722e014cdbc1625119a677b71e1270af

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