Malicious PDF — malware analysis report

Static analysis result for SHA-256 0d9e5859d95ed53d…

MALICIOUS

PDF

42.1 KB Created: 2020-08-06 21:10:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf848b7447bdd84525a04aa11b4792e8 SHA-1: 380033e33fb607c0416414f1f900ad8998e4eb72 SHA-256: 0d9e5859d95ed53df125b6202e596c2ccc7ca626b7593cd344071a41973b4bd7
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though malformed, contains text related to 'area and perimeter and volume formulas' and the malicious URL, suggesting a lure to disguise the malicious intent. The presence of many external links, including to Shopify, indicates a link farm designed to attract traffic and potentially distribute further payloads.

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=area+and+perimeter+and+volume+formulas+for+all+shapes+pdf
    • http://files.oneroomschoolhouses.ca/uploads/1/3/1/4/131407647/bobezatogulagi.pdf
    • http://files.holytrinityplymouth.co.uk/uploads/1/3/0/7/130738914/a6545dbc.pdf
    • http://files.miriamruberlartist.com/uploads/1/3/1/4/131483019/828517e6fc26dc2.pdf
    • http://files.nativevillageofportheiden.com/uploads/1/3/0/7/130740316/746241e.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6134/6466/files/21980511722.pdf
    • https://cdn.shopify.com/s/files/1/0431/2884/8538/files/69752977673.pdf
    • https://cdn.shopify.com/s/files/1/0432/6152/6166/files/pixuworuma.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/53567737566.pdf
    • https://cdn.shopify.com/s/files/1/0450/8313/2056/files/react_native_cache.pdf
    • https://cdn.shopify.com/s/files/1/0431/0768/0405/files/fogibixi.pdf
    • https://cdn.shopify.com/s/files/1/0434/9886/4800/files/sisap.pdf
    • https://cdn.shopify.com/s/files/1/0435/0305/9110/files/bivuxivinenunu.pdf
    • https://cdn.shopify.com/s/files/1/0431/7318/3637/files/jemugoxovaxalikakijaw.pdf
    • https://cdn.shopify.com/s/files/1/0435/5905/9615/files/53823077692.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3097/files/78374920770.pdf
    • https://cdn.shopify.com/s/files/1/0434/4925/4041/files/nudigofopujumolologo.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_off0000669d.bin
3c75886c157ae304894539faa9041423ab9d501644d23322a65d6b1a309dcbe2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x669D 5332 bytes
font_01_sfnt_off0000789d.bin
44f48d4444aabf98a0dadaa12f202fa0e6eed85b73c8002472c4200616030e12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x789D 10004 bytes

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