Malicious PDF — malware analysis report

Static analysis result for SHA-256 e60d32ddd9404f07…

MALICIOUS

PDF

37.9 KB Created: 2020-08-10 07:37:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1a503a1f9c625deac5317da40bd83152 SHA-1: 394e3ec4511b03b434be20169240c335ae0eae7b SHA-256: e60d32ddd9404f0730fdaeab5eabecab01dcf1fc81433f1e2dbdddbed6585cc9
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/pify?keyword=a+question+of+power+bessie+head+pdf'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of outbound links, with the first being 'https://cdn.shopify.com/s/files/1/0433/8122/7672/files/kelufadi.pdf'. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect the user.

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.cc/pify?keyword=a+question+of+power+bessie+head+pdf
    • http://sewetok.bishopwoodsschool.com/uploads/1/3/2/6/132695569/1f70b389.pdf
    • http://files.desotoyou.com/uploads/1/3/1/4/131452988/wojimemulol.pdf
    • http://files.familylawyerminnesota.com/uploads/1/3/1/6/131607712/jubigi_vomikewupinoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8122/7672/files/kelufadi.pdf
    • https://cdn.shopify.com/s/files/1/0431/9376/1941/files/noun_verb_adjective_adverb_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0440/1161/8462/files/discord_verified_games.pdf
    • https://cdn.shopify.com/s/files/1/0428/8276/0870/files/sijinusisuxanawuwuwofe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vuwizesovipijekugufex.pdf
    • https://cdn.shopify.com/s/files/1/0430/2936/4889/files/discord_voicemeeter_banana.pdf
    • https://cdn.shopify.com/s/files/1/0433/3531/9711/files/nukixebozozojamel.pdf
    • https://cdn.shopify.com/s/files/1/0434/9778/3458/files/74496903287.pdf
    • https://cdn.shopify.com/s/files/1/0428/0818/0895/files/herculine_barbin.pdf
    • https://cdn.shopify.com/s/files/1/0432/8059/7152/files/38885316618.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/52454021948.pdf
    • https://cdn.shopify.com/s/files/1/0436/1561/7182/files/29734131695.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/alcoholemia_en_sangre.pdf
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files/doweramodo.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/
    • https://cdn.shopify.com/s/files/1/0432/8184/2341/files

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000569b.bin
7ed9a209b80056382b9750781e10b3957ec8cce96e5f7ec803eef9db71535feb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x569B 5444 bytes
font_01_sfnt_off00006924.bin
bd74b5cdf3a268d2845663e112ead37bb55cf80d560e9faf5148d4570e5bf972		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6924 9784 bytes

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