Malicious PDF — malware analysis report

Static analysis result for SHA-256 4ec70453f0ef148e…

MALICIOUS

PDF

41.8 KB Created: 2020-08-09 17:24:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-23
MD5: 0a1acb71e87800e4a5cb0f717de80451 SHA-1: 3018a326394a6e1e9ed6390508243a24f45e04ac SHA-256: 4ec70453f0ef148e2d4ad43757453a02b0fdae6ba98b651a15f5e55911f9c6c5
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious link, 'https://ttraff.ru/pify?keyword=ansys+help+pdf+download', is identified as a known malicious redirector. The document body text and embedded links suggest a phishing or scam attempt, likely to lead users to malicious content or malware downloads. No scripts were extracted, but the PDF structure itself facilitates the malicious redirection.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=ansys+help+pdf+download In PDF document text
    • http://files.dennishorseshoes.com/uploads/1/3/1/0/131070202/99cd95cf434f96.pdfIn PDF document text
    • http://munisuta.bartek.systems/uploads/1/3/1/4/131454065/lafuvukigis.pdfIn PDF document text
    • http://files.lezdapez.com/uploads/1/3/1/4/131453245/robebenilibuduwuvono.pdfIn PDF document text
    • http://files.digitalbankinginnovationapac.fintecnet.com/uploads/1/3/0/7/130775310/wavewepelowe_lilupuregafeva.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/1/0440/7135/4533/files/83307897861.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/79504974086.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3314/8062/files/51525946782.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2802/7304/files/zivap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4111/1712/files/winuxijef.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1615/9395/files/gipululepabezijivuguleri.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4085/7494/files/48397608031.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8860/0478/files/nasatudojatuxisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0624/6557/files/bulletin_de_paie_simplifi_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4660/6760/files/how_to_run_first_aid_from_recovery.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0271/4533/files/76750696717.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x63F0 5216 bytes
SHA-256: b5c971f42bc4bab606e0128a24cebc874749afd733c5c0c44ed4273a30578f64
font_01_sfnt_off000075cc.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75CC 10784 bytes
SHA-256: 5e913f1aeaa433778fb1bdd5c67cab292f1b8a2189c0635f9600feb0655147fc

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