Malicious PDF — malware analysis report

Static analysis result for SHA-256 ec81405ea875ed8f…

MALICIOUS

PDF

43.9 KB Created: 2020-08-24 21:39:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9e32ce3866b04efb3803dc2d52131a25 SHA-1: 04e2bd65ec4da3a71e33b3351441303a2edffc6c SHA-256: ec81405ea875ed8fd25daa43de6876f8b757e485b11c29c1ac1d375abeb0e612
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=interim+report+portugues'. This indicates the document's primary purpose is to lure the user to a malicious site. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning tactic to obscure the malicious redirector. No scripts were extracted, but the PDF structure and embedded links strongly suggest a social engineering attack.

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=interim+report+portugues In PDF document text
    • http://vitago.nataliejimenez.com/uploads/1/3/1/0/131070420/dimavegigesu-vizimukax-ranavaror.pdfIn PDF document text
    • http://nodotimix.tipdi.com/uploads/1/3/0/8/130874038/kujudososu-faditixazeje-nelekamuvigub.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/1/0429/4826/4089/files/90958764874.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3033/0019/files/39460249095.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7233/1675/files/mavukajudij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1900/9173/files/hybrid_and_alternative_fuel_vehicles_4th_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7176/6681/files/titopasaruzeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/tazoxusejeko.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0447/9628/0983/files/characteristic_function_of_a_set.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0444/2708/3943/files/46971798303.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4031/6311/files/vepigupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0965/5462/files/54930274777.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3333/7768/files/50620222771.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

Related samples 5

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005864.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5864 4832 bytes
SHA-256: 58f40f11002ea3c8fb324e72a51fffc552ca681ed480949b35f698e4f51d32c9
font_01_sfnt_off000068bc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x68BC 10948 bytes
SHA-256: 9cfe9aa9a774b691f60d2de3da767b82214a826f188f1a8b9be7bd9e1fe7f1cd
font_02_sfnt_off00008e4a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E4A 16068 bytes
SHA-256: 687267c9c3db9c7ba5925ba46e702bad05deca9442433a35c4d1c7c9873e4b92

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