Malicious PDF — malware analysis report

Static analysis result for SHA-256 193a8f8c96d9b758…

MALICIOUS

PDF

48.8 KB Created: 2020-08-09 03:46:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d588424dfbae5a40129b4dfda158d0d4 SHA-1: 0d933e00c07126ce458f0ffab12cf983b7deeee3 SHA-256: 193a8f8c96d9b75896e30abd9daff59970e7f90e429b94fec174642d3028f5ad
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to a phishing or malware distribution site. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly indicated maliciousness, supporting the assessment of a malicious redirector and potential phishing attempt.

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=arcanum+guide+pdf
    • http://files.thebigsergeant.com/uploads/1/3/0/8/130874207/luxewegobosen_danudegodibijot_nilukum.pdf
    • http://files.popcollection.store/uploads/1/3/2/3/132303270/2135401.pdf
    • http://files.alpenviro.com/uploads/1/3/2/8/132815791/7138cd5423f1e60.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/5496/4631/files/luted.pdf
    • https://cdn.shopify.com/s/files/1/0434/2857/7447/files/the_story_of_an_hour_free.pdf
    • https://cdn.shopify.com/s/files/1/0430/8910/0951/files/65242086986.pdf
    • https://cdn.shopify.com/s/files/1/0440/6129/4757/files/arhat_stencils.pdf
    • https://cdn.shopify.com/s/files/1/0431/1692/0994/files/bowodaroduje.pdf
    • https://cdn.shopify.com/s/files/1/0431/4729/6924/files/27429107648.pdf
    • https://cdn.shopify.com/s/files/1/0435/5765/0584/files/chilton_labor_guide_free.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3283/files/guzub.pdf
    • https://cdn.shopify.com/s/files/1/0431/5460/4198/files/45873610070.pdf
    • https://cdn.shopify.com/s/files/1/0428/1873/2191/files/49634113044.pdf
    • https://cdn.shopify.com/s/files/1/0435/1921/3727/files/97823513692.pdf
    • https://cdn.shopify.com/s/files/1/0431/3920/3229/files/34162438302.pdf
    • https://cdn.shopify.com/s/files/1/0431/1613/4562/files/kuzibojojajanikal.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008283.bin
93c5fd33b4293dd05eeb8ed4a9e47263cebe0f110be0f3cdf039c3aa10354138		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8283 5256 bytes
font_01_sfnt_off00009451.bin
c62fe04efc191d77f63663308ad90984e2602fbee8a879053646f73dcf337a15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9451 9920 bytes

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