Malicious PDF — malware analysis report

Static analysis result for SHA-256 5ab44e8e146639ea…

MALICIOUS

PDF

41.4 KB Created: 2020-09-15 20:25:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbdb1d39b0da315436b9d5eb3972ef85 SHA-1: 8dd09b047932eba93da98cd051b83666c16a5d7f SHA-256: 5ab44e8e146639ea510174c97877aa617783565407d50b9b0f0d188476eae403
194 Risk Score

Malware Insights

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

The PDF contains a lure related to 'Msb friendly banks' and includes numerous links, many pointing to external PDFs, suggesting a link farm or redirection strategy. One critical heuristic identified a link to known malicious redirector infrastructure, specifically 'https://ttraff.link/pify?keyword=msb+friendly+banks', which is a strong indicator of a phishing or credential harvesting attempt. The ML classifier also strongly flagged this PDF as malicious.

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.
  • Payment redirection / bank-detail change lure high SE_PAYMENT_REDIRECT_LURE
    Document describes new or changed bank, wire, ACH, IBAN, SWIFT, or routing instructions — a high-value business-email-compromise 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.link/pify?keyword=msb+friendly+banks
    • http://lezizo.maranathabiblens.com/uploads/1/3/0/7/130776132/4893919.pdf
    • http://files.shorethingexotics.com/uploads/1/3/0/7/130739488/fujiveginu.pdf
    • http://ribomasez.renegadesfp.com/uploads/1/3/0/9/130969742/zabefel_suvodonimik_xebibol_bolivino.pdf
    • http://towadi.g2store.org/uploads/1/3/1/4/131407089/8471987.pdf
    • http://fawalaj.milaraphael.com/uploads/1/3/0/7/130776541/bawutotedupaleraguwe.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d1d005_47f33fecd7f74d1da59d531c2ed0a3dd.pdf
    • https://static.usrfiles.com/ugd/0e6328_e232cf7cc66e4fa488208c1a7c167bc2.pdf
    • https://static.usrfiles.com/ugd/ab5adf_8451677e1938440bb46237fa658f0579.pdf
    • https://static.usrfiles.com/ugd/575363_b66c37d3b1e64d17a1de8baab7a2f05e.pdf
    • https://static.usrfiles.com/ugd/7603ae_368afa9b6896481d996c610a13cfc815.pdf
    • https://cdn.shopify.com/s/files/1/0430/4414/3253/files/refraction_by_a_prism_discussion_of_theory.pdf
    • https://cdn.shopify.com/s/files/1/0434/0950/6471/files/deped_tambayan_curriculum_guide_filipino.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_off00006408.bin
e3f2972d043c8620e273a09bb77ace08c13739986ecb0e8b9a1a268aa8b1cfe6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6408 5212 bytes
font_01_sfnt_off000075e3.bin
dfb52ea312f4090d245b42497bd8f9c6481847a122a6f0c501ed76de66c2acac		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E3 10216 bytes

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