Malicious PDF — malware analysis report

Static analysis result for SHA-256 a65a8c8c30bfc279…

MALICIOUS

PDF

45.4 KB Created: 2020-08-10 10:47:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f70e32f79b19d0a6c6d5a51723e6491c SHA-1: 78f540f3ee122a074b2d0d147279cfc50932856f SHA-256: a65a8c8c30bfc2790cfe8aa9203ceab35f7476661f961a25a6a05d3e02d0d87b
194 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to `https://ttraff.ru/pify?keyword=anemia+en+ni%25C3%25B1os+pdf+minsa`. Additionally, it exhibits characteristics of a PDF link farm, with numerous external PDF links, many hosted on `cdn.shopify.com`. The ML classifier also strongly flagged this PDF as malicious. The document body contains text related to 'Anemia en niños pdf minsa', suggesting a lure to disguise the malicious links.

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=anemia+en+ni%25C3%25B1os+pdf+minsa In PDF document text
    • http://files.dutzowballpark.com/uploads/1/3/2/6/132696048/8202760.pdfIn PDF document text
    • http://files.pivot-nyc.com/uploads/1/3/1/4/131437246/mafebukisoxazow.pdfIn PDF document text
    • http://files.mary-ellenfriedland.com/uploads/1/3/1/3/131398094/6151211.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/1/0432/5025/3979/files/devejugumilukupelino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4642/1158/files/55429128818.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3484/5079/files/zupeto.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2771/6520/files/rilanojo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1670/5432/files/30219685268.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6626/9600/files/rexunukawizumabadix.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6357/4682/files/derawerotubo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1280/6040/files/17837607071.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8499/5991/files/lajakafu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3437/0470/files/donon.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 6

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_off000070ec.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70EC 5260 bytes
SHA-256: 9d18136a138da51c7d95f41fd8ed4ae6d48eedc10f0bbc32e5b8b15ed512aaa0
font_01_sfnt_off00008280.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8280 11096 bytes
SHA-256: fbcebceac9abd4c65cfcdc2748218dce2c54d4eab0d2ed25d6098c035bbe37b8

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