Malicious PDF — malware analysis report

Static analysis result for SHA-256 a3d87d1622880b12…

MALICIOUS

PDF

55.1 KB Created: 2020-07-31 16:57:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b735f891e517ef6a9ecf739862b4922 SHA-1: 82a5fe8c3b856b0820cd1cc804882cdacd476f71 SHA-256: a3d87d1622880b127dad51e5b3ef9ab6d052f5104f2d84678fb38ff4056e2b38
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains a heuristic firing for a malicious redirector link, specifically 'https://ttraff.cc/pify?keyword=4.+4.+5%253A+tostring+for+flowers+codehs'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. This suggests an attempt to manipulate search engine results or to lure users to malicious destinations. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of intent beyond link manipulation.

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=4.+4.+5%253A+tostring+for+flowers+codehs In PDF document text
    • http://files.wendycharlton.net/uploads/1/3/0/8/130873783/xedenifogimuzefik.pdfIn PDF document text
    • http://files.elasad.com/uploads/1/3/1/4/131452861/rudetokopeko.pdfIn PDF document text
    • http://files.coachcollinsfootballcamp.com/uploads/1/3/1/1/131163683/niwaloxixaxu.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/1/0436/9635/7530/files/sojuwolipexatapitig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zosogorimojafi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9682/6273/files/bejifilesasadafezisumu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4590/3774/files/97846544125.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/6113314933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5358/8390/files/98166317492.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nemevisofopanufu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4227/4471/files/jarunulirunage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1095/6196/files/fozukubumuni.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1891/0870/files/37745248854.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5135/1207/files/xipafopusadeveriwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2278/6466/files/34945325383.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_off00007727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7727 5152 bytes
SHA-256: bac73d27328ce0b4fc6e6deaff7993b9324b93fd40f5171ba860280a1800902c
font_01_sfnt_off000088c1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x88C1 10600 bytes
SHA-256: b7b26dfd31cef0e1208817b4c3be7def750df0ea67982529e63b6ddc7ab7af1a
font_02_sfnt_off0000ac60.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xAC60 16096 bytes
SHA-256: 0887bc94add3ccbae2623ecc1f1fe48d304d441f3d2189e3e5b876bc141dc419
font_03_sfnt_off0000c12b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC12B 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378