Malicious PDF — malware analysis report

Static analysis result for SHA-256 64617075fb9deb5e…

MALICIOUS

PDF

36.4 KB Created: 2020-07-30 10:44:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4939e2e2e6453774975163ad28aaa07f SHA-1: 2c660f84234229847ab64cd70f19fdf44573326b SHA-256: 64617075fb9deb5e84ff017498d18d344443a9e722c0723cd58f044d58ae5c5c
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains numerous links to a redirector infrastructure, identified as a malicious link farm and a lure for free downloads. The primary redirector URL is `https://ttraff.cc/pify?keyword=blank+answer+sheet+1+200+pdf`, which likely leads to the download of a second-stage payload. The ML classifier strongly indicated maliciousness, and the presence of multiple external links 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.cc/pify?keyword=blank+answer+sheet+1+200+pdf In PDF document text
    • http://files.wapentakeleeds.co.uk/uploads/1/3/2/6/132681316/9631786.pdfIn PDF document text
    • http://files.themechatroniclibrary.com/uploads/1/3/1/3/131379594/c9bd62.pdfIn PDF document text
    • http://files.momnovel.com/uploads/1/3/1/4/131482958/3656597.pdfIn PDF document text
    • http://files.mackeiganmarketing.com/uploads/1/3/0/8/130873839/8386677.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/1/0427/4146/5244/files/linafejatujonavosit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9868/6111/files/fibukij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1274/9469/files/78701737565.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7062/7735/files/38650348651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3866/2053/files/zimapipodogibilosuvuwuter.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6686/0455/files/65259960525.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/zexewabug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/37872338034.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6196/7013/files/sufedinijarebejedixuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2073/7950/files/kafonelotowoxiru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7245/4807/files/jiperumudutalew.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_off000052f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x52F8 5288 bytes
SHA-256: dcf002bdfc49864183014ea2af06e0500cd9fd0cc82cce74bab59dd6f01b418a
font_01_sfnt_off000064fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64FC 9240 bytes
SHA-256: 08e064ddb2898dae835107ee9a34b45c7422ec9cefd0b5c4c5b5b5d6707a0755

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