Malicious PDF — malware analysis report

Static analysis result for SHA-256 01ff6aa27552ad4b…

MALICIOUS

PDF

50.8 KB Created: 2020-08-12 10:29:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1cb35ef41e60e82cfcdd081974f42765 SHA-1: 4ba68be7815240c099cc625655a97d2f9382c5f9 SHA-256: 01ff6aa27552ad4b64f7507e52992d1fa34d864426694de8b600e1bbb0d38ca2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, many pointing to a redirector service (ttraff.ru) which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to disguise malicious links as legitimate content. The ML classifier strongly indicates maliciousness, and the presence of a malicious redirector points towards a phishing or malware distribution attempt.

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=ejercicios+resueltos+de+movimiento+ondulatorio+fisica+pdf In PDF document text
    • http://daposewo.alliancetoheal.com/uploads/1/3/2/8/132814930/cec618.pdfIn PDF document text
    • http://files.crystalfletcher.com/uploads/1/3/2/6/132695560/zinejebajuv.pdfIn PDF document text
    • http://files.susanmaakestad.com/uploads/1/3/0/7/130775953/buxagifuvevagin-manugabefawemof-ditupovetadegek-kukuk.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/1/0433/3538/5243/files/17811271486.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2614/3639/files/zirixoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3663/0422/files/25657015294.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/82191842179.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/mekanisme_ampicillin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9403/2025/files/54920588401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8127/7352/files/65724319082.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5458/8316/files/same_meaning_words.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4363/2805/files/26631674629.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/1046/3643/files/19909404196.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4430/5061/files/51592838735.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_off00006773.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6773 5392 bytes
SHA-256: bec120f92e9b4b4d3eb664725e576b8ce5cfc73405abc0610b53e9145ceda13f
font_01_sfnt_off000079bd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x79BD 14972 bytes
SHA-256: aecddc979b7aa57fce4b5aa788322ed488872625334cda733addde485602c706
font_02_sfnt_off0000a767.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA767 16036 bytes
SHA-256: 149cab45689013e99d1aa520d2e5234663aa5d8577b6aae5e423b5d60aeda4c1

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