Malicious PDF — malware analysis report

Static analysis result for SHA-256 129af00b386db982…

MALICIOUS

PDF

84.3 KB Created: 2020-08-04 23:21:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 401060b7fa6dc85257cf5b618c27eaa8 SHA-1: 9af9c94bad8fb2458e94751b25a0486543e3e260 SHA-256: 129af00b386db982478c0d0a3897ac5e5fe018668dfdd1f23e61090376a7bbab
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to what appears to be a link farm designed for SEO manipulation, with one critical link identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Canadian visa application form' and mentions 'wkhtmltopdf', suggesting a lure for an advance-fee scam. The presence of a malicious redirector indicates an attempt to lead the user to a malicious site.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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=canadian+visa+application+form+pdf+format
    • http://files.aikaneparts.com/uploads/1/3/2/6/132680986/429fb580.pdf
    • http://files.headoverboards.net/uploads/1/3/0/7/130738507/b23ad8b829344.pdf
    • http://files.strawberrymooncounselling.com/uploads/1/3/0/7/130740112/sogubovekeragaki.pdf
    • http://files.weavercenter.org/uploads/1/3/0/7/130775448/pufuki.pdf
    • http://files.amagier.com/uploads/1/3/1/1/131164176/vorubeka.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0433/4046/4281/files/registery_first_aid.pdf
    • https://cdn.shopify.com/s/files/1/0429/0910/6335/files/xeruroja.pdf
    • https://cdn.shopify.com/s/files/1/0430/6305/0394/files/84476277698.pdf
    • https://cdn.shopify.com/s/files/1/0427/7947/6134/files/31088553049.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/68054125238.pdf
    • https://cdn.shopify.com/s/files/1/0433/3436/9438/files/printing_an_array_in_java.pdf
    • https://cdn.shopify.com/s/files/1/0432/8049/8841/files/lifolusireborigepezu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3724/5086/files/zinirejiwiloborifokidol.pdf
    • https://cdn.shopify.com/s/files/1/0429/1746/2182/files/wodomewezukofego.pdf
    • https://cdn.shopify.com/s/files/1/0440/3996/2774/files/91909604467.pdf
    • https://cdn.shopify.com/s/files/1/0434/1753/4629/files/63565591530.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dewefezagabujam.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000ad2c.bin
e69f0bfce72f502529da99740c8313e9464e3593bae73575819fa9afb635b132		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD2C 23744 bytes
font_01_sfnt_off0000f80a.bin
469ab551e019a6c18823dbcc9d6589f61e85f4b3e7a35a2c97608372541aaee8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF80A 5052 bytes
font_02_sfnt_off0001091f.bin
46be857274475be374f2513b6adaa1a69969d990fa882580b7a542562fd1559c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1091F 13756 bytes
font_03_sfnt_off00013517.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13517 4324 bytes

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