Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e86503cf7e4434e…

MALICIOUS

PDF

44.1 KB Created: 2020-08-19 13:00:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0a0669aedc667d0dd79a93f82b152e9a SHA-1: 0982afb2ba3dbc90fdbd29366c187d7d61f5ae28 SHA-256: 6e86503cf7e4434ef78cab7d9466229234dd5c24ff4be488250be71186428088
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link that redirects to a known malicious URL, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body and embedded links suggest a lure related to job applications or templates, aiming to trick users into clicking the malicious link. 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.com/pify?keyword=transferable+skills+cv+template
    • http://xejitizun.merakiandcoffee.com/uploads/1/3/0/8/130814328/zolepojatifosonejuf.pdf
    • http://files.starofbethlehemcmechurch.org/uploads/1/3/1/8/131860787/wokamizalonobe.pdf
    • http://files.urbancanopyworks.com/uploads/1/3/1/6/131636725/fd18f6be7.pdf
    • http://gurem.asiamitchelltabb.com/uploads/1/3/1/4/131454024/xoxowomukesenu_tozutafig.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0427/6856/4380/files/fovijefiworopudesuwobajow.pdf
    • https://cdn.shopify.com/s/files/1/0437/6877/4807/files/44158994532.pdf
    • https://cdn.shopify.com/s/files/1/0435/5273/5391/files/costing_and_estimation_textbook.pdf
    • https://cdn.shopify.com/s/files/1/0437/9649/6544/files/id_card_template_design.pdf
    • https://cdn.shopify.com/s/files/1/0429/7113/6154/files/naxagobad.pdf
    • https://cdn.shopify.com/s/files/1/0433/6045/2760/files/kewuwapunamo.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4204/files/patisise.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_off0000609d.bin
7957ccb30add480a4c3025998af49768ae04bf676f694b8153bfe2a3c71cdde6
pdf-font-stream PDF embedded font (sfnt) at offset 0x609D 5052 bytes
font_01_sfnt_off000071ab.bin
771c3378dae0cec989731ebe112862756a41d311f5df1ef0e15c01f18987658f
pdf-font-stream PDF embedded font (sfnt) at offset 0x71AB 10560 bytes
font_02_sfnt_off000095c6.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361
pdf-font-stream PDF embedded font (sfnt) at offset 0x95C6 4324 bytes