Malicious PDF — malware analysis report

Static analysis result for SHA-256 4b344b8ae7ad04dd…

MALICIOUS

PDF

41.0 KB Created: 2020-08-07 22:05:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2707a8dc28fa2a4398b6f0e71f976ad1 SHA-1: 4949ef5519424e7393f3fd2ca5daed06d7791104 SHA-256: 4b344b8ae7ad04dd07287a51ecc6c2d73f23e2c43dc6282b79d995d04f56a39b
194 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=enlace+quimico+metalico+pdf' which is identified as a malicious redirector. Additionally, the file contains a large number of embedded links, many pointing to shopify.com domains, suggesting a link farm or SEO poisoning tactic to distribute malicious content.

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=enlace+quimico+metalico+pdf In PDF document text
    • http://rexip.lfhhsonline.com/uploads/1/3/0/8/130874276/woliv-tezigufa-podop.pdfIn PDF document text
    • http://files.guidedlondontours.com/uploads/1/3/0/8/130813645/6519450.pdfIn PDF document text
    • http://files.cobrasfhc.ca/uploads/1/3/1/1/131163836/sugix.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/1/0432/2089/3851/files/58427710198.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7623/0046/files/minecraft_tinkers_construct_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66179678401.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3646/5559/files/navy_start_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/ladubufugadelu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1165/3277/files/how_to_paint_basement_ceiling.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7098/0247/files/12539748254.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2470/1845/files/gitepo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0350/1989/files/33010614988.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3338/4344/files/liberia_history_since_1980.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6356/6755/files/99590827092.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1858/3192/files/47918888835.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0978/4482/files/91441878140.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 4

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_off00006355.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6355 5112 bytes
SHA-256: dd57164fbd93afff78b218ca72926025f629edfb6264b0de9dc87c69c539d889
font_01_sfnt_off000074b0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74B0 10112 bytes
SHA-256: b40a06a1cbd5144a753f746355173c76eee0139c7d26c4d51bf71f984040d1b4

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