Malicious PDF — malware analysis report

Static analysis result for SHA-256 757c63de963dc535…

MALICIOUS

PDF

41.7 KB Created: 2020-08-08 01:50:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 013f5ad615697d0c7e4452c4a1be4fb0 SHA-1: 7edea748d7aea1fe4e6260148ae8a2ac6213a6a7 SHA-256: 757c63de963dc535d8955660427768f6d80e7d45ccb37008a7fbefc1e22a6473
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains a URL that leads to a redirector, likely intended to trick users into downloading a malicious payload under the guise of a free PDF. The ML classifier strongly indicates maliciousness.

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=equivalencias+benzodiacepinas+pdf In PDF document text
    • http://metajogi.communitycatcarecenter.com/uploads/1/3/0/8/130874330/sezojadatitav_fijopevubu_wamikowejuzukex_ditumerefutafe.pdfIn PDF document text
    • http://files.deardahlia.net/uploads/1/3/2/6/132683000/c446f.pdfIn PDF document text
    • http://files.mackatak.net/uploads/1/3/0/7/130740521/4093272.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/1/0439/2953/4632/files/wigotavagofomulivawuvexap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2767/6829/files/18722332260.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xigidewepiwunabifaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/reragijod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3900/6632/files/28158074489.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8804/4442/files/tobaliwekarokobixuzike.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/26420510035.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7311/9143/files/minecraft_shrink_mod.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0553/2569/files/saxose.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/76685421079.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1683/8558/files/dasekonawoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0281/3849/files/11778212132.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0821/9560/files/the_bible_in_arabic_sidney_griffith.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/15491755960.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 3

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_off000063fc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63FC 5384 bytes
SHA-256: 3574cee2a2faaeb963abacde65e84d7a68b0183a05b1e069a11379e38c19bfdf
font_01_sfnt_off0000766f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x766F 10772 bytes
SHA-256: bd75001f0cfcf5cf6e5633df898fb0d3e399de5615145953d0ea9ca9f1bd4d29

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