Malicious PDF — malware analysis report

Static analysis result for SHA-256 6c35e98eebb78f28…

MALICIOUS

PDF

50.9 KB Created: 2020-08-16 23:45:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 499306e6a1df985d0a5bacfa33857f44 SHA-1: 8607758dc2866c9f42d1e688c2d57e02baaa8a3e SHA-256: 6c35e98eebb78f285c24d4ff358d451d33e338db0f4cabc8f72d8bd453b11f38
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, with a critical heuristic firing for a malicious redirector. The primary link directs to 'ttraff.com', which is flagged as malicious. The document body, though heavily obfuscated, contains the same URL, suggesting an attempt to disguise the malicious destination. The presence of numerous Shopify links, some flagged as benign and others unknown, indicates a link farm strategy.

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=guided+meditation+for+sleep+and+gratitude
    • http://files.romehomelb.com/uploads/1/3/1/4/131437873/82e676.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/7871/2472/files/15013828469.pdf
    • https://cdn.shopify.com/s/files/1/0430/6914/5241/files/63196699247.pdf
    • https://cdn.shopify.com/s/files/1/0439/8078/3774/files/padudamiveretud.pdf
    • https://cdn.shopify.com/s/files/1/0428/0975/3767/files/guidebook_death_note_13.pdf
    • https://cdn.shopify.com/s/files/1/0427/8996/1884/files/67343072871.pdf
    • https://cdn.shopify.com/s/files/1/0432/4474/8950/files/77817211748.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/6326069065.pdf
    • https://cdn.shopify.com/s/files/1/0450/9663/2472/files/pelogeribovoromizunejuzed.pdf
    • https://cdn.shopify.com/s/files/1/0432/8947/7273/files/problemas_psicosociales_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0429/3348/5727/files/39891819263.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065d7.bin
9fef71ffff6780791dbd1e6d835cf2a0a137632ce473c07dae49e3769d6afefe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65D7 5276 bytes
font_01_sfnt_off000077ab.bin
271a403c41a6667a95a162d85c8926c3e4cefa2d508636820bac4bcbcb60ae03		 pdf-font-stream PDF embedded font (sfnt) at offset 0x77AB 10472 bytes
font_02_sfnt_off00009af0.bin
1882111c93182885355c326966aa8b929451d516289c4c69bffbc3e8f6f639a9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9AF0 16076 bytes
font_03_sfnt_off0000af9e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF9E 4324 bytes

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