Malicious PDF — malware analysis report

Static analysis result for SHA-256 015eb231f40aa437…

MALICIOUS

PDF

41.3 KB Created: 2020-08-05 10:48:11 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 25eb811e4c1fb04d19dae4effae6f9d4 SHA-1: 9335ee84136c02896b96705c129d258384968f99 SHA-256: 015eb231f40aa437b75bd1722bfc18f0f4c043e374aa6b55b9ac3dd443c0a166
154 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded links, particularly the one to 'ttraff.ru', are likely part of a phishing or malware distribution scheme.

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=apostles+creed+anglican+pdf
    • http://files.peoplenaturefood.ca/uploads/1/3/0/7/130739754/278823.pdf
    • http://files.rustedchrome.com/uploads/1/3/0/7/130738639/6fae12e9acc5e1b.pdf
    • http://files.killarneytraynor.com/uploads/1/3/1/8/131857315/juxibugij.pdf
    • http://files.myoppconsulting.com/uploads/1/3/1/4/131406714/86edb.pdf
    • http://files.riveredgeschoolsreach.com/uploads/1/3/1/1/131163904/zekoji-ladawaguz-goriroj-piponiw.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/7578/7162/files/lobexinemapumoxom.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/warriors_the_ultimate_guide.pdf
    • https://cdn.shopify.com/s/files/1/0431/6784/2465/files/77805517727.pdf
    • https://cdn.shopify.com/s/files/1/0434/4355/2416/files/63062006255.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lonub.pdf
    • https://cdn.shopify.com/s/files/1/0432/3255/9267/files/40733667916.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5018/files/91429797959.pdf
    • https://cdn.shopify.com/s/files/1/0435/6990/5825/files/90348275560.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/meragavafeduxilaxopuxaw.pdf
    • https://cdn.shopify.com/s/files/1/0430/3116/7137/files/7867839905.pdf
    • https://cdn.shopify.com/s/files/1/0432/3010/1668/files/oppositional_defiant_disorder_fact_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0435/7334/6465/files/88488626481.pdf
    • https://cdn.shopify.com/s/files/1/0433/6012/5080/files/49809335190.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000063b8.bin
42035bab441c34913d56f66370306f9b79186807416fd37d3231112a990f70b8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63B8 5312 bytes
font_01_sfnt_off000075da.bin
7f1cc17473e437c9d45f0bc09fa3161628d20a156f11bf7718334e5661a3be71		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75DA 10076 bytes

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