Malicious PDF — malware analysis report

Static analysis result for SHA-256 301b7f10fe7a7824…

MALICIOUS

PDF

47.2 KB Created: 2020-08-04 22:59:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d92b52160361ed9fa5676f8cf5c14504 SHA-1: adfabeb2edf1cb12b2ffe90e27d6d337bdc989da SHA-256: 301b7f10fe7a7824cad1d4460fabb0a18aa6279bb0b608737500fdb63c1199e0
194 Risk Score

Malware Insights

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

The PDF contains a link disguised as 'Aptitude test questions and answers in tamil pdf' which redirects to a malicious URL. The PDF also contains a large number of external links, many hosted on Shopify, suggesting a link farm or redirection tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be social engineering via a deceptive link.

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=aptitude+test+questions+and+answers+in+tamil+pdf In PDF document text
    • http://files.devokehunters.com/uploads/1/3/1/4/131454505/4fcff8aa49.pdfIn PDF document text
    • http://files.zambiasafarihunting.com/uploads/1/3/0/8/130874394/xodosafaniku-jovetujam-vuref.pdfIn PDF document text
    • http://files.unclerhetts.com/uploads/1/3/0/8/130814855/sanebegu-wexibasukokuk-tujabovaleki-tosekavironiti.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/1/0434/1547/0245/files/37907598617.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0477/1999/files/21656861861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7837/6853/files/kefawujatelalaxazaxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4807/4396/files/peranafekixob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7383/1073/files/supuzodufera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2160/6817/files/lorusubilufawev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4091/3061/files/42151686116.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7812/3680/files/81922548088.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/32222195416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8228/5216/files/dipuwux.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2351/5294/files/78060304737.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 6

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_off00006d33.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D33 5396 bytes
SHA-256: 5d3bc9f69687b839a98b71602cdf43354f5361f338d1f5215933de995197c4aa
font_01_sfnt_off00007f89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F89 15356 bytes
SHA-256: fbbf3c240ef28992b09cb6221753471a58c02135bcd9e136e194ee2645c12978

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