Malicious PDF — malware analysis report

Static analysis result for SHA-256 37df49c84ff9cf4d…

MALICIOUS

PDF

220.3 KB Created: 2020-08-07 01:29:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 51db2313b4c10a171a31cac8d716d38d SHA-1: d6a39e800fb0a862654a4c6b3a0caba35627b8d2 SHA-256: 37df49c84ff9cf4dfced9b648e8202d27d7c2ae6841b799ae311aed36951c575
134 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, https://ttraff.com/pify?keyword=autobiography+of+mahatma+gandhi+pdf, is the primary indicator of malicious intent. The document body, though heavily obfuscated, also contains this URL, reinforcing its role in the attack. The file type and authoring application suggest it was generated programmatically, likely to obscure its malicious payload.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9995

Heuristics 4

  • 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.
  • 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=autobiography+of+mahatma+gandhi+pdf In PDF document text
    • http://files.kerishea.com/uploads/1/3/2/6/132682913/bovazari_lesifavab.pdfIn PDF document text
    • http://files.hamiltongrace.org/uploads/1/3/2/8/132814241/deratewaripizi.pdfIn PDF document text
    • http://files.pittsburghdieselkings.com/uploads/1/3/1/1/131164236/vonamusetexuxu.pdfIn PDF document text
    • http://files.whatdowewantfilms.com/uploads/1/3/2/7/132740637/9566840.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.indictrans.orgIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0848/2710/files/41605091881.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8134/3903/files/zovaxurutukogivanenorasaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5323/6902/files/73767111029.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3998/8648/files/menijez.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4540/files/fumexolasarinofarexoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1008/8360/files/vazafetirivivimojuwilotok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2985/5393/files/sql_injection_attacks_and_defense_second_edition_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7153/6285/files/dimel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1823/1709/files/sirifozixafusejumosomegi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0290/4222/files/42020073059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/9949/4302/files/tosamizimufatatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2275/1643/files/patukasabemovewogurud.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00030d13.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x30D13 5476 bytes
SHA-256: 6e5ef3f8f7f1d1b1914f16c4a9f3a8d0d4d83e8a95985dc15d5f69127769945e
font_01_sfnt_off00031f90.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x31F90 5236 bytes
SHA-256: f21b05a2340b363a1ed8b0bbfc234bf9da5e90c1c639b98be765a2f280f9ba06
font_02_sfnt_off0003301d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x3301D 12032 bytes
SHA-256: a178426f1cf6b0c26e2ffa6bcb793b4c7e92ef8fea62f9b826009a845436ab18
font_03_sfnt_off00035740.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x35740 2688 bytes
SHA-256: 1e0d5806c011263fead0d0a97ee2ef622c56622b8772aec8198e3c33d023e126