Malicious PDF — malware analysis report

Static analysis result for SHA-256 14f3e26012e89cc1…

MALICIOUS

PDF

43.8 KB Created: 2020-08-02 02:33:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 49d2272795fbc6bc1fd885c21fa072a2 SHA-1: fbcb9235c1f06b1652d1022a6d5e4dcecbb8b869 SHA-256: 14f3e26012e89cc171a45fc38ae5af893452bad4a5e902c43bfe2fcd34413ff2
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a significant number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO manipulation tactic. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=ham+license+lookup', is identified as known malicious redirector infrastructure. The ML classifier also strongly indicated maliciousness.

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.ru/pify?keyword=ham+license+lookup
    • http://files.midnightsand.com.au/uploads/1/3/1/3/131378923/37a2890644.pdf
    • http://files.airestdion.com/uploads/1/3/2/6/132695569/47cbc.pdf
    • http://files.bendiskant.com/uploads/1/3/1/3/131379832/467787.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0430/7707/5108/files/projective_test_psychology_definition.pdf
    • https://cdn.shopify.com/s/files/1/0431/4857/4884/files/jowobenofituroladu.pdf
    • https://cdn.shopify.com/s/files/1/0432/9200/0422/files/sims_4_no_mosaic.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/46930509940.pdf
    • https://cdn.shopify.com/s/files/1/0428/6929/3223/files/osrs_combat_guide_p2p.pdf
    • https://cdn.shopify.com/s/files/1/0431/7836/0987/files/gogexovasijemenezar.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/wadilizesiwegokadokepub.pdf
    • https://cdn.shopify.com/s/files/1/0429/1470/9663/files/87556042921.pdf
    • https://cdn.shopify.com/s/files/1/0429/1559/4399/files/zoguporevixofemu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9546/files/63062525637.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_off00006022.bin
e9bedda021bd0aed67d18a8728d852681ee1e771ce2a3127bcae3dae02281987
pdf-font-stream PDF embedded font (sfnt) at offset 0x6022 4808 bytes
font_01_sfnt_off00007059.bin
ecbc300be0af8089cb684b7bcde436b5232cd5b1058ab3f7b63b04d84cb426d9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 10716 bytes
font_02_sfnt_off000094e2.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c
pdf-font-stream PDF embedded font (sfnt) at offset 0x94E2 4324 bytes