Malicious PDF — malware analysis report

Static analysis result for SHA-256 98b12cea77d502d1…

MALICIOUS

PDF

40.2 KB Created: 2020-08-07 16:21:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cfaab0bcf982561badaad889480dfc4f SHA-1: 1efd3de7813a9798fa81db656bde848ebd7340fc SHA-256: 98b12cea77d502d1c99a9438e0ba4941671ad693710a3dee1fdaedca0ba5f66b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, many pointing to what appears to be SEO-optimized content farms, with a primary redirector identified as malicious. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=gmat+mock+test+pdf', which is flagged as a malicious redirector. This suggests a phishing or scam attempt, likely using the 'Gmat mock test pdf' lure to entice clicks.

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.com/pify?keyword=gmat+mock+test+pdf In PDF document text
    • http://mojoti.takaikari.com/uploads/1/3/1/8/131871390/01285.pdfIn PDF document text
    • http://files.stanleyjusticeproductions.com/uploads/1/3/1/3/131397971/58071.pdfIn PDF document text
    • http://kawozij.voiceofhoperct.org/uploads/1/3/0/7/130739777/758c8e499985a.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/1/0428/5782/4415/files/2504881117.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6374/6465/files/jobamulubopagufirete.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3050/2806/files/zipumam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0781/1495/files/firefox_for_windows_xp.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8850/2174/files/11647433133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9482/7415/files/dugasibufazolewamumapez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7414/1864/files/mortal_kombat_x.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2746/3324/files/gidoxajalowoselatakomege.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5964/9429/files/tanugivoxalulepelimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0193/0143/files/88470461402.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 5

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_off00005d7e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5D7E 5268 bytes
SHA-256: a0e51b957b3495c6a777cd7c349fa71fbe990290beb22dc73ed01f61b3f38f99
font_01_sfnt_off00006f65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6F65 10928 bytes
SHA-256: 568ce14fb7edd08db7283b4074d60a5669f08888d98a4858ea79e3934747fc03

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