Malicious PDF — malware analysis report

Static analysis result for SHA-256 7185fca6cb5854c1…

MALICIOUS

PDF

109.1 KB Created: 2020-08-09 18:29:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0bbdd7f585e999df40c9f4f7c4160e3f SHA-1: 5ee4c28135cfd57c4b1b6229f395a2017ff111bb SHA-256: 7185fca6cb5854c195780e5bcf09c68a1587743b90d3bd439a2418e5b718f7b2
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 a link to a known malicious redirector at 'https://ttraff.com/pify?keyword=kp+astrology+in+tamil+pdf'. The document body, though heavily obfuscated, contains text fragments suggesting it is disguised as an astrology PDF. The presence of multiple external PDF links, many hosted on Shopify, indicates a link farm designed to obscure the ultimate destination and potentially distribute further malicious content.

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=kp+astrology+in+tamil+pdf
    • http://files.lafayetteschoolrestoration.com/uploads/1/3/1/3/131398357/nutuva.pdf
    • http://files.universityauto.org/uploads/1/3/1/4/131438299/gufugetubufet-gimokibe-jonazed.pdf
    • http://files.bea-cambodia.org/uploads/1/3/1/0/131071041/610325.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/9635/6504/files/70662966804.pdf
    • https://cdn.shopify.com/s/files/1/0434/3480/3352/files/48190744163.pdf
    • https://cdn.shopify.com/s/files/1/0430/8706/9348/files/61645030934.pdf
    • https://cdn.shopify.com/s/files/1/0431/8376/7713/files/30424258656.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/takuz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5725/9420/files/16898642138.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0433/5622/5686/files/bamon.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3640/files/26600416857.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/79972850621.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000164d5.bin
d70f1cda901b4a85bce76bbc3d6654139c01b234170f2aafdcdc4c3fc4b4ec48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x164D5 5100 bytes
font_01_sfnt_off00017616.bin
19d861555377c254a06fb9d061fa135f5323a7988368028ed26b89d237f88ecb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x17616 10288 bytes
font_02_sfnt_off00019904.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x19904 4324 bytes

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