Malicious PDF — malware analysis report

Static analysis result for SHA-256 763798caea51b6a2…

MALICIOUS

PDF

45.4 KB Created: 2020-08-14 12:28:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74d48bb1b383e9fd26855fa6d051210a SHA-1: 2d6870d0e104895a4512302816b42c3d8fe3b4c8 SHA-256: 763798caea51b6a2f61a114f7fd55516c8ebf42f390950cae301f99d0286fb72
162 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many pointing to shopify.com, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.ru/pify?keyword=top+offline+navigation+apps+for+android'. The document body, though partially corrupted, also contains this URL, indicating it's a primary lure. The presence of numerous links and the redirector strongly suggest a malicious intent to drive traffic or potentially deliver further payloads.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Urgency / deadline lure low SE_URGENCY_LURE
    Document contains urgency or deadline language ('account will be terminated', 'action required within 24 hours', etc.) — useful context, but low-signal without other findings
  • 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=top+offline+navigation+apps+for+android
    • http://files.warriorheartedmom.org/uploads/1/3/0/9/130969469/wexibufidavusevasu.pdf
    • http://vasemowe.parklandhsband.com/uploads/1/3/0/8/130874058/mozijabodub.pdf
    • http://finagefa.anewreligion.net/uploads/1/3/0/8/130874038/jepararoto_fazozigotosuvu_muwenu.pdf
    • http://wupiwiwag.chattanoogaumc.org/uploads/1/3/1/4/131483281/xagigu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/7668/1882/files/definition_of_differential_calculus.pdf
    • https://cdn.shopify.com/s/files/1/0430/7661/6341/files/wabowaride.pdf
    • https://cdn.shopify.com/s/files/1/0440/3603/0614/files/4423149691.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/b_r_automation_studio_4.pdf
    • https://cdn.shopify.com/s/files/1/0430/3477/1610/files/miwodegiduvilovazu.pdf
    • https://cdn.shopify.com/s/files/1/0431/2648/9249/files/89153727737.pdf
    • https://cdn.shopify.com/s/files/1/0432/0870/4164/files/37252329565.pdf
    • https://cdn.shopify.com/s/files/1/0430/5115/5618/files/25363028366.pdf
    • https://cdn.shopify.com/s/files/1/0437/8938/5888/files/german_shepherd_training_books.pdf
    • https://cdn.shopify.com/s/files/1/0433/8617/5651/files/equipe_village.pdf
    • https://cdn.shopify.com/s/files/1/0452/4064/7841/files/94745330170.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/11411440246.pdf
    • https://cdn.shopify.com/s/files/1/0432/7519/0430/files/arduino_code_guide_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.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_off00007316.bin
9ed5a947bb3c63bff3da3a32e13f4b300b9b834460dcae3c72c676e81c3dcb8b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7316 5216 bytes
font_01_sfnt_off000084eb.bin
47209e615db0a6f8cee8f6e468c3d569501fe6d4066433669be75093a8f036b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84EB 10288 bytes

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