Malicious PDF — malware analysis report

Static analysis result for SHA-256 9a6d5ddae50acfd7…

MALICIOUS

PDF

33.8 KB Created: 2020-08-21 18:02:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d00ffba8ab39acdb62568efedc9915a3 SHA-1: bb3568761204e5a83ec0b9b2bf1557b51bc0654d SHA-256: 9a6d5ddae50acfd7c8d5ff06f9ce3fd3fdc7100523426f4160c39ac0a3103fc4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains embedded links, one of which, 'https://ttraff.ru/pify?keyword=fsk+tape+data+sheet', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to trick the user into clicking it. The presence of numerous other links, many pointing to Shopify, indicates a link farm strategy, likely to obscure the malicious destination.

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=fsk+tape+data+sheet
    • http://files.jumpstartmath.org/uploads/1/3/2/7/132741476/sogegepop-susuni-xobumos-pamebububiwoz.pdf
    • https://cdn.shopify.com/s/files/1/0428/5975/7734/files/yubikey_windows_login_configuration_guide.pdf
    • https://cdn.shopify.com/s/files/1/0430/9955/3959/files/xigexoxisagawaxame.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2494/files/93834516900.pdf
    • https://cdn.shopify.com/s/files/1/0440/8537/9237/files/64222762439.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/wowivitotorinu.pdf
    • https://cdn.shopify.com/s/files/1/0438/5102/2501/files/98096395300.pdf
    • https://cdn.shopify.com/s/files/1/0433/5376/8095/files/sovar.pdf
    • https://cdn.shopify.com/s/files/1/0433/0602/5128/files/tijulitodowejemowuxaba.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_off0000457d.bin
ac9c5ccebb4310675423d24edc84f2bbaaf586678436057384cb8886dd8321b4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x457D 4940 bytes
font_01_sfnt_off00005644.bin
cc11af7a38ed086632474f9a2d5c23e591eb32923278f8cb2c758fb5e1d6242c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5644 10324 bytes

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