Malicious PDF — malware analysis report

Static analysis result for SHA-256 c2f4302f13ee9247…

MALICIOUS

PDF

62.8 KB Created: 2020-08-08 13:39:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 316e48e1f02bdc2122c3d2b9255ef445 SHA-1: 3af0908bcd1d52beb013f6bcf367f6b98f66a9a3 SHA-256: c2f4302f13ee9247e8a8ca610f80402b4a3c541345056fc10102adaec16dfd74
152 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 embedded URLs, many hosted on Shopify. The document body, though heavily obfuscated, contains the string 'Bmw m5 2020 brochure pdf' and the malicious URL, suggesting a lure to download a brochure. 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=bmw+m5+2020+brochure+pdf
    • http://files.singyoursoulsongworkshop.com/uploads/1/3/2/6/132683334/vufokaruti-mapasosikenasu-gazoxomezize.pdf
    • http://files.decojewelry.net/uploads/1/3/0/7/130739693/7c3820.pdf
    • http://files.porkpalace.com/uploads/1/3/0/7/130740018/ripanogi_nosoxosul_puwawelawu.pdf
    • https://cdn.shopify.com/s/files/1/0435/2878/1988/files/jatojunukisodilenilexa.pdf
    • https://cdn.shopify.com/s/files/1/0430/5459/6250/files/zololufofafoginipegifaba.pdf
    • https://cdn.shopify.com/s/files/1/0433/9122/1911/files/a_thousand_years_cello_sheet_music_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/0224/7838/files/jafib.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/99110294825.pdf
    • https://cdn.shopify.com/s/files/1/0437/7876/9045/files/linux_administrator_interview_questions_and_answers_for_freshers.pdf
    • https://cdn.shopify.com/s/files/1/0433/4914/7803/files/lazegemosuvubeser.pdf
    • https://cdn.shopify.com/s/files/1/0439/4539/4331/files/3495675900.pdf
    • https://cdn.shopify.com/s/files/1/0433/8273/5006/files/kokakilalidewevata.pdf
    • https://cdn.shopify.com/s/files/1/0428/7276/6631/files/matekonem.pdf
    • https://cdn.shopify.com/s/files/1/0431/1462/7234/files/67574328010.pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6242/files/kamojolirakurumij.pdf
    • https://cdn.shopify.com/s/files/1/0436/7027/4201/files/59643832825.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_off0000b72c.bin
d7ae21d7eabaf26fe5cfc68a8b2f6774d043431529e8c7f810f58fc9925d3009
pdf-font-stream PDF embedded font (sfnt) at offset 0xB72C 5656 bytes
font_01_sfnt_off0000ca59.bin
00756f181be69f81f6267ea2f7d80a0ca137e482865fb5668e1af6826d5da1c9
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA59 10480 bytes