Malicious PDF — malware analysis report

Static analysis result for SHA-256 97d8656ae2cae4d7…

MALICIOUS

PDF

50.9 KB Created: 2020-08-25 20:03:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e2d8e07943682d7eba043f0682b509cd SHA-1: 0bf4cbbbfacfc7c9acd027cc54983d71080133e3 SHA-256: 97d8656ae2cae4d7d509e9b3c3fa1c79189bbe0b6e10054cb4b2f07f46529d56
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 link farm. The primary malicious URL identified is 'https://ttraff.com/pify?keyword=geometria+vectorial+y+analitica+udea', which is likely used to funnel victims to further malicious content. The document body, though heavily obfuscated, contains references to the same URL, reinforcing its role in the attack. The presence of numerous links to external PDFs, many hosted on Shopify, suggests a coordinated effort to distribute malicious content or engage in SEO manipulation for malicious purposes.

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=geometria+vectorial+y+analitica+udea
    • http://files.mpbanners.com.au/uploads/1/3/0/7/130738569/gibebivolu-kusukorukan-mitulelegeredat.pdf
    • https://cdn.shopify.com/s/files/1/0433/8801/0659/files/53773139186.pdf
    • https://cdn.shopify.com/s/files/1/0457/7217/7564/files/wanted_bhojpuri_movie_video_hd.pdf
    • https://cdn.shopify.com/s/files/1/0432/7928/6428/files/ruripadavubixarebupa.pdf
    • https://cdn.shopify.com/s/files/1/0432/8259/6004/files/gefimorisagoxodirona.pdf
    • https://cdn.shopify.com/s/files/1/0427/5005/0460/files/88383528410.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/baby_school_bus_game.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wanojexabe.pdf
    • https://cdn.shopify.com/s/files/1/0434/6963/5734/files/27594821636.pdf
    • https://cdn.shopify.com/s/files/1/0429/3384/6172/files/xetodojabetaduz.pdf
    • https://cdn.shopify.com/s/files/1/0430/5308/8921/files/zupilikomamogaxakijorum.pdf
    • https://cdn.shopify.com/s/files/1/0430/4420/8797/files/mewamo.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008928.bin
d92b232c754b1650211248a7f0b402dea6fe35200c1c753e378b84ff8d6e825a
pdf-font-stream PDF embedded font (sfnt) at offset 0x8928 5100 bytes
font_01_sfnt_off00009a76.bin
372b9df7361f1e0ba74273dd9436fe17dedcc22597bc46f4b746ac4b7bbd1a0e
pdf-font-stream PDF embedded font (sfnt) at offset 0x9A76 10576 bytes