Malicious PDF — malware analysis report

Static analysis result for SHA-256 16f75134acfe157e…

MALICIOUS

PDF

43.4 KB Created: 2020-08-11 19:33:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e56826a601757e9c828f54f2d61b389b SHA-1: c757e9175f87da369887495db06fd3ee760f80fd SHA-256: 16f75134acfe157eca2b82087663d53f2717eb0905312b0562ea4916eb550c7b
154 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a malicious redirector infrastructure. The document's content, though garbled, suggests a lure related to 'vehicle dynamics basics', likely to trick users into clicking the malicious links. The presence of a large number of external PDF links also indicates SEO link farm activity, further supporting a malicious intent to drive traffic to potentially harmful sites.

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=vehicle+dynamics+basics+pdf
    • http://tudidulof.revdenisetracy.com/uploads/1/3/1/6/131606248/68441bbcf.pdf
    • http://files.flopinions.net/uploads/1/3/2/6/132695569/deffb096fa382e.pdf
    • http://files.stirchleyartroom.co.uk/uploads/1/3/1/4/131408942/fogilusorutapazefal.pdf
    • http://zufumunu.nategroshan.com/uploads/1/3/2/8/132814930/munugodix-botewurumosafo.pdf
    • http://files.footstepserie.org/uploads/1/3/2/8/132815882/8c7d1d6307.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/38256670519.pdf
    • https://cdn.shopify.com/s/files/1/0433/9413/8268/files/70253365881.pdf
    • https://cdn.shopify.com/s/files/1/0433/8571/6901/files/75657928812.pdf
    • https://cdn.shopify.com/s/files/1/0432/3531/1784/files/visibimogusivusukozij.pdf
    • https://cdn.shopify.com/s/files/1/0430/9798/1089/files/40979577146.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/xixitoguje.pdf
    • https://cdn.shopify.com/s/files/1/0448/1299/2672/files/algebra_2_first_semester_review.pdf
    • https://cdn.shopify.com/s/files/1/0434/5207/2086/files/witonugu.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6561/files/titilod.pdf
    • https://cdn.shopify.com/s/files/1/0437/8234/0770/files/game_of_thrones_season_1_download.pdf
    • https://cdn.shopify.com/s/files/1/0436/2865/8848/files/dofazivikunirupizibit.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_off0000695d.bin
4c312953875993cdc4da5e0ef3410d84a2fb1d3eea8c91a0130b35bd700bb453		 pdf-font-stream PDF embedded font (sfnt) at offset 0x695D 5504 bytes
font_01_sfnt_off00007bec.bin
a94fc13f47b6f16d13e2288bfba11230142682daa9c76bcd66ec34ebefb2ead8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7BEC 11404 bytes

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