Malicious PDF — malware analysis report

Static analysis result for SHA-256 b31ef74e537dd30f…

MALICIOUS

PDF

94.5 KB Created: 2020-08-10 05:24:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2017fb0014e5a235831200b3a8dbae1c SHA-1: 6ebf27c9b8c9763e1523517a42ac2b71a1228f1b SHA-256: b31ef74e537dd30fd904c76557a3d8bf6c66181d4e321336e80b8446325e7f32
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to ttraff.com. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The ML classifier also strongly indicated maliciousness. The primary intent appears to be redirecting the user to malicious infrastructure, likely for phishing or malware delivery.

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=agama+di+indonesia+pdf
    • http://files.mermaidscoin.com/uploads/1/3/1/4/131411474/nolubufebusimu_rokoro.pdf
    • http://files.katedumbleton.com/uploads/1/3/1/3/131380616/4435498.pdf
    • http://files.ambientled.net/uploads/1/3/0/8/130874246/4871648.pdf
    • http://mebevajo.dangerouslimits.org/uploads/1/3/1/3/131380600/bidezexivunutav_vuvugoraponiro.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/gogegizenu.pdf
    • https://cdn.shopify.com/s/files/1/0429/0763/1779/files/ninaniwilepofubatufugidiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/73944195873.pdf
    • https://cdn.shopify.com/s/files/1/0428/4085/0598/files/gufajowemoxagurorepedewev.pdf
    • https://cdn.shopify.com/s/files/1/0437/6638/2749/files/49072747932.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/93097385995.pdf
    • https://cdn.shopify.com/s/files/1/0438/0504/8989/files/diablo_3_cheats_xbox_one.pdf
    • https://cdn.shopify.com/s/files/1/0430/7730/4484/files/gowelugigotegoluw.pdf
    • https://cdn.shopify.com/s/files/1/0435/1908/2651/files/rokozejokodidozudi.pdf
    • https://cdn.shopify.com/s/files/1/0430/6780/1749/files/xowimojasusoleferop.pdf
    • https://cdn.shopify.com/s/files/1/0437/1077/5464/files/bo_jackson_30_for_30.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00013490.bin
14fc908778395aff94e6b7a373fae61e13010e3121ebf06dd30ce5c99c5b69bd
pdf-font-stream PDF embedded font (sfnt) at offset 0x13490 5220 bytes
font_01_sfnt_off0001464e.bin
4fbb17c557cec41a1812c534309c3857a2ce2890168a72ad859d6e6bb799a535
pdf-font-stream PDF embedded font (sfnt) at offset 0x1464E 10948 bytes