Malicious PDF — malware analysis report

Static analysis result for SHA-256 1e20a21405d96b10…

MALICIOUS

PDF

52.4 KB Created: 2020-08-11 22:19:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 98c33825a0036ff81570c113d1cddff6 SHA-1: ba5bab85b1b92056da3579b8918ed0fb845cc647 SHA-256: 1e20a21405d96b106c66fa7e89d82436a8ed60417ebfc06df671ec9cb3ae21fd
194 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=pdf+capitalismo+y+esquizofrenia'. The document body, though heavily obfuscated, contains this URL and references 'wkhtmltopdf', indicating it was likely generated programmatically to host these links. The primary attack pattern is to lure users to 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.ru/pify?keyword=pdf+capitalismo+y+esquizofrenia In PDF document text
    • http://gutatej.danielbuchanan.net/uploads/1/3/1/3/131384240/9e2d584c0ef.pdfIn PDF document text
    • http://files.truevibrancy.com/uploads/1/3/1/3/131383838/9fa8ea965e.pdfIn PDF document text
    • http://files.countryside-puppies.com/uploads/1/3/0/7/130740517/zezokanuke.pdfIn PDF document text
    • http://files.ceblankenship.com/uploads/1/3/1/4/131406592/kuzixove-wafisipikag-duzapitod-sitaxowozesona.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/1/0429/5337/5897/files/diwavobarorakeju.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1849/2824/files/ladinanijusivufovawekiluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0698/3333/files/nusazefunigulawosevib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/nomujesajosubuwerurag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8702/8639/files/canoscan_9000f_mark_ii_user_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/fimovubonivunab.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6564/7012/files/stainless_steel_medieval_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9476/1877/files/zasaboje.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0098/7801/files/3268329328.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/60757681726.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0199/3622/files/xepejira.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_off00006abe.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ABE 5460 bytes
SHA-256: ad57def553434b894ffff9680a2d6b30b9c2c265562724e99bb7cc2487a1f937
font_01_sfnt_off00007d41.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7D41 10544 bytes
SHA-256: 99ffee9e58134979cb6dcb14d5f4126eac2297f121fbe02327e972f40b02e2e9
font_02_sfnt_off0000a121.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA121 16120 bytes
SHA-256: c94926d5202b085e184a5666363eda0a421a0de498e0fbda8ae973291059b9dc
font_03_sfnt_off0000b60d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB60D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3