Malicious PDF — malware analysis report

Static analysis result for SHA-256 e996d27d389d1029…

MALICIOUS

PDF

40.9 KB Created: 2020-08-17 05:13:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cff9bbd16f01c626535bb11dfa4aae36 SHA-1: c1fef8846223e68a6baeb04e78a3da94c00cbec3 SHA-256: e996d27d389d1029951c398d40897ae7e8c7875f585ff74dca747649b6f50b3e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on shopify.com, likely to obscure the malicious destination. The ML classifier also strongly indicated maliciousness. No scripts were extracted, but the primary attack vector appears to be the malicious redirector.

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=forma+de+contagio+giardia
    • http://files.mesalegria.com/uploads/1/3/1/4/131438397/naruralatedogep.pdf
    • http://files.dremilyleonard.com/uploads/1/3/2/7/132740435/xoguwuwawudupigibal.pdf
    • https://cdn.shopify.com/s/files/1/0431/2740/6746/files/34443279055.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/3785448733.pdf
    • https://cdn.shopify.com/s/files/1/0432/6971/8182/files/82015272462.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/34924011959.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/cr_10_monsters_5e.pdf
    • https://cdn.shopify.com/s/files/1/0427/9477/8791/files/92994785927.pdf
    • https://cdn.shopify.com/s/files/1/0431/9900/4827/files/giwozawizovunajatinilalu.pdf
    • https://cdn.shopify.com/s/files/1/0440/8023/4661/files/majesty_hillsong_chords.pdf
    • https://cdn.shopify.com/s/files/1/0437/1972/1115/files/jukim.pdf
    • https://cdn.shopify.com/s/files/1/0431/0840/1316/files/jzyk_angielski_czasy_wiczenia_do_druku.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/biblical_names_with_meaning.pdf
    • https://cdn.shopify.com/s/files/1/0435/2930/6263/files/zobuvavavinomizeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/9469/5329/files/40572506313.pdf
    • https://cdn.shopify.com/s/files/1/0435/3851/4071/files/95719095087.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_off00006281.bin
2b6a833784c5a3151a92a8c47a06cd02e7cf881379ed1c698b4cc36ad8e1c487
pdf-font-stream PDF embedded font (sfnt) at offset 0x6281 5004 bytes
font_01_sfnt_off0000736e.bin
2096dcf0bd144ddd733e0c531f8fd2f088d94e96a8dce9f278ce3afbfc20f589
pdf-font-stream PDF embedded font (sfnt) at offset 0x736E 11028 bytes