Malicious PDF — malware analysis report

Static analysis result for SHA-256 049afffa04986224…

MALICIOUS

PDF

64.8 KB Created: 2020-08-10 19:49:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb1b41b8ee74cd0e959b32a0fbd0f1e4 SHA-1: 6ca42eb7d706f2cde10a5b93cf5fccf24a0ca2b2 SHA-256: 049afffa04986224353735c855efad93b5c64127a639705e6978d61ae53f1c17
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.com, which is likely used to obscure the final destination of the malicious content. The document also includes a large number of links to external PDFs, suggesting a link farm or SEO poisoning tactic to increase visibility. The ML classifier strongly indicates malicious intent.

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=silent+words+in+english+a+to+z+pdf
    • http://files.furrypeoplepetsitting.com/uploads/1/3/1/0/131069763/9274357.pdf
    • http://lemasekej.foxedenterprises.com/uploads/1/3/0/8/130874493/folokogasuzeruf.pdf
    • http://files.oaxacamezcaltours.com/uploads/1/3/1/3/131398145/da881e7f6.pdf
    • http://files.bearvalleyanimalhospital.com/uploads/1/3/2/6/132682731/nudoti-lafej-jazijupumupusew-pabakidekutul.pdf
    • http://files.nnhst2.org/uploads/1/3/1/3/131379612/lufuxofuwusuwufaposi.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/0237/9939/files/84369368339.pdf
    • https://cdn.shopify.com/s/files/1/0428/9721/1558/files/al_ittihad.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2013/files/kptcl_syllabus.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/anabolismo_de_las_proteinas.pdf
    • https://cdn.shopify.com/s/files/1/0431/2901/2381/files/nomulavabepurupa.pdf
    • https://cdn.shopify.com/s/files/1/0430/0328/1571/files/copy_banner_minecraft.pdf
    • https://cdn.shopify.com/s/files/1/0427/4877/2519/files/75493587892.pdf
    • https://cdn.shopify.com/s/files/1/0430/5109/0077/files/19311708695.pdf
    • https://cdn.shopify.com/s/files/1/0430/0485/4426/files/tugaz.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4214/files/rodijel.pdf
    • https://cdn.shopify.com/s/files/1/0431/7495/3124/files/calculus_10th_edition_larson_and_edwards.pdf
    • https://cdn.shopify.com/s/files/1/0440/7053/5318/files/17760870127.pdf
    • https://cdn.shopify.com/s/files/1/0431/2485/0842/files/37862567628.pdf
    • https://cdn.shopify.com/s/files/1/0431/0790/9794/files/buride.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000b3a8.bin
db5e2751aabdcaafd0e89dff4adf505d0af820e387fd6e377c073eb723e288e9		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3A8 5548 bytes
font_01_sfnt_off0000c68a.bin
26b7434360fe900c4a7e4f23a1fb9bf9b6552aebc56395160256ee6b90e0f5ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC68A 2484 bytes
font_02_sfnt_off0000d18a.bin
e05380ae05aa45e7dba34aa961ea3411907cac3682db730b14dd936fe3410af7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD18A 10420 bytes

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