Malicious PDF — malware analysis report

Static analysis result for SHA-256 935aa13d99e2a29a…

MALICIOUS

PDF

48.1 KB Created: 2020-08-06 07:36:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 71e1b9b04693925b7adb8a09579e5b0d SHA-1: cefeb762a236b5ec34d2b0795478a23cacb2e5b9 SHA-256: 935aa13d99e2a29ac4e4a8760ff6b60c1764f8f61f6b12da054e606969ae7cb3
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a technique often used to create link farms for SEO manipulation or to redirect users to malicious sites. One critical heuristic identified a link to a known malicious redirector, 'https://ttraff.ru/pify?keyword=carbs+food+list+pdf', which is presented as a 'carbs food list pdf'. This suggests a social engineering attempt to trick the user into clicking the link. The presence of many Shopify-hosted PDF links, while individually benign, contributes to the overall suspicious nature of the document as a potential link farm.

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=carbs+food+list+pdf In PDF document text
    • http://files.robinsongolfart.com/uploads/1/3/0/7/130739059/71b5cfd32e.pdfIn PDF document text
    • http://files.152811427883146431.com/uploads/1/3/0/8/130814926/ecf835.pdfIn PDF document text
    • http://files.shoptaorminajewelry.com/uploads/1/3/0/7/130776276/wadumidosoxixowapi.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/1/0432/9121/3980/files/ruzodujasuxitazakemosusax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6350/1222/files/kajigusotonozezetixap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4747/7667/files/34011522767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kozaw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3164/9689/files/zekamaredovogokufubu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8365/3535/files/64821835923.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8513/6021/files/kuwem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2821/0073/files/50605010046.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/0624/5534/files/zajituzumi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3400/7973/files/76736908383.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0702/5060/files/70478336247.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/nevapamiwefadeva.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_off00007e74.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E74 5080 bytes
SHA-256: 1674bc914e50f981659f15636074cc256c1db1987b7d439fc4008a33cfae4d69
font_01_sfnt_off00008fba.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8FBA 10500 bytes
SHA-256: a928e07ed7fe064976ded49325f6cb5a26a2154d17fa95133e1f7592213e0c7e

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