Malicious PDF — malware analysis report

Static analysis result for SHA-256 759fbfecd7a7c626…

MALICIOUS

PDF

114.7 KB Created: 2020-07-31 21:08:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cd8af10962fded11df392528a6fd1197 SHA-1: 118e4120c47bcf40b146a68b5ce6acb6d1a808f5 SHA-256: 759fbfecd7a7c626c7b99fdc478d98b8ed28465f8adc42a43f753eef22a4b813
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying it as a link farm pointing to malicious redirector infrastructure. The primary malicious URL, https://ttraff.com/pify?keyword=national+type+1320+ue+drawworks+manual, is likely used to redirect users to a malicious site. While no scripts were explicitly extracted, the PDF structure and embedded links suggest an attempt to exploit users through deceptive content, aligning with spearphishing tactics.

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.com/pify?keyword=national+type+1320+ue+drawworks+manual
    • http://files.americanpoolsrvc.com/uploads/1/3/0/7/130775222/d67813cef7.pdf
    • http://files.dictionaerie.com/uploads/1/3/1/1/131164399/b78b2827a.pdf
    • http://files.gsfchristianacademy.org/uploads/1/3/1/4/131409090/bilego-batijemosoresi-kajefux.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/tawuwefabe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1782/1605/files/pibuwagufoxijutufemino.pdf
    • https://cdn.shopify.com/s/files/1/0436/7722/1017/files/80131929630.pdf
    • https://cdn.shopify.com/s/files/1/0428/3973/6487/files/54672665766.pdf
    • https://cdn.shopify.com/s/files/1/0437/7729/4498/files/55591662832.pdf
    • https://cdn.shopify.com/s/files/1/0430/4686/3005/files/83214468615.pdf
    • https://cdn.shopify.com/s/files/1/0434/3519/6568/files/xezixum.pdf
    • https://cdn.shopify.com/s/files/1/0429/5314/6517/files/47375095088.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/kujefitil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/92600871449.pdf
    • https://cdn.shopify.com/s/files/1/0431/2937/2832/files/vexebixa.pdf
    • https://cdn.shopify.com/s/files/1/0432/5467/7662/files/35715045070.pdf
    • https://cdn.shopify.com/s/files/1/0433/3033/8966/files/mabunu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0044/6626/files/13421004253.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_off000179cd.bin
93591669c580d58e760d2086a1f109d1df88bcf19322591c4e75bb463c4d0770		 pdf-font-stream PDF embedded font (sfnt) at offset 0x179CD 5824 bytes
font_01_sfnt_off00018daf.bin
3fbd142f3e0c1a7ad397e4b35120bc82b8769a150b17bbddfe312689277945e8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x18DAF 15388 bytes

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