Malicious PDF — malware analysis report

Static analysis result for SHA-256 539d5bac260d715f…

MALICIOUS

PDF

473.6 KB Created: 2020-08-31 03:54:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 18a2a25856e0c7fd2f3a91b01c56e4b6 SHA-1: f88c3beea270cbda060d682d2db8291ad40838e9 SHA-256: 539d5bac260d715f5add2a5e2dc67427a15a3e11aa61387d623c276fa3770da1
94 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing indicating a malicious redirector link. The embedded URL, 'https://ttraff.ru/wix?keyword=players+guide+to+eberron+3.+5', is directly associated with known malicious infrastructure. The document body, though heavily obfuscated, contains this URL, suggesting it's the primary lure. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9993

Heuristics 3

  • 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.
  • 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/wix?keyword=players+guide+to+eberron+3.+5
    • https://cdn.shopify.com/s/files/1/0431/4729/6922/files/rozikiro.pdf
    • https://cdn.shopify.com/s/files/1/0447/8153/5389/files/person_centred_approach_in_social_work.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/demadetalidagi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2700/4577/files/kakuniduviloketulas.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wojilezufaguxulidumusad.pdf
    • https://cdn.shopify.com/s/files/1/0439/4264/1832/files/89226047616.pdf
    • https://static.usrfiles.com/ugd/0ebc1f_9754c7c1b34c4cf5bceeb66bd0d5fbf8.pdf
    • https://static.usrfiles.com/ugd/37428b_fee531eaf67a4a38bed9488ab3b73219.pdf
    • https://static.usrfiles.com/ugd/e23fbb_0a1ecec6ddde4cf7b82441dba3c2f70d.pdf
    • https://cdn.shopify.com/s/files/1/0437/7162/5621/files/kilupukukujisojorujazan.pdf
    • https://cdn.shopify.com/s/files/1/0433/9515/4070/files/37758706356.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0006ff34.bin
6b7dc7f82e14a0f7db73b0ee978b958836b5354025a8ecfb6f0963c1d84f6d92		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FF34 5556 bytes
font_01_sfnt_off00071231.bin
786fe100b9586002262ffda3e4184bad83e045b3ab6e74c401da04ebba9e3687		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71231 15804 bytes
font_02_sfnt_off00074325.bin
e1335e9333b0fd069fc99cf67aa66b9ac579b250ae34e9768adc6584942ecda6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74325 16316 bytes

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