Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3f4a4000187fec5…

MALICIOUS

PDF

54.5 KB Created: 2020-08-04 16:17:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 35f5a2b8eccc3ad103bb32aacb848013 SHA-1: 3a96bb8b4e9d0e731a10aeeb0aa99d3ef8172b67 SHA-256: a3f4a4000187fec58f5ca11e8a6be9998dfca3f686414efd4bd8595ed2c17eb7
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to a URL that appears to be a lure for a "bankers adda current affairs quiz pdf". The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL. The presence of numerous other links to benign Shopify PDFs suggests a link farm tactic, likely to obscure the malicious redirector.

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=bankers+adda+current+affairs+quiz+pdf In PDF document text
    • http://files.oldsskatingclub.ca/uploads/1/3/2/7/132740584/fesina_nebedaka.pdfIn PDF document text
    • http://files.remembrancestars.com/uploads/1/3/0/9/130969966/korogewarazib.pdfIn PDF document text
    • http://files.plasticproductionallc.com/uploads/1/3/1/6/131636612/72507fd.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1320/9246/files/osrs_water_battlestaff.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6547/5226/files/71361166870.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0058/6649/files/18262526236.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2675/0362/files/pexetusamoje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/wagarusugika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/93236297381.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9236/1887/files/63263916073.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1464/4127/files/pofuxej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4363/5879/files/zogizozuxedujudufele.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8307/0629/files/73482397193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6663/0037/files/bejusufixizezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6942/3269/files/wegoxopo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/20260349644.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0593/3730/files/gudonutilapegowop.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

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000074e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74E9 5180 bytes
SHA-256: e0e5907ac7b595faff01d4179205a98a056becf4824c3a5af4696df611413da3
font_01_sfnt_off00008699.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8699 10028 bytes
SHA-256: 6d226015a64236c89f98e7865bf4fc570acd2df301569eddce19f2b189aa3281
font_02_sfnt_off0000a8f2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA8F2 16164 bytes
SHA-256: ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8
font_03_sfnt_off0000be0b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xBE0B 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3