Malicious PDF — malware analysis report

Static analysis result for SHA-256 0b263eef490f3383…

MALICIOUS

PDF

41.0 KB Created: 2020-08-24 18:26:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01fbb516f188bf028961b777b1685e7e SHA-1: b1bc30ba72e45dfe8d131c34f34cbac31448d94e SHA-256: 0b263eef490f3383011f782a84056de35c59ecf45efae972048392634fcf2b4c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests an attempt to drive traffic to malicious infrastructure, possibly for phishing or malware distribution. 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.ru/pify?keyword=film+storyboard+format
    • http://files.luxfabusa.com/uploads/1/3/0/8/130873708/5781117.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/6402/5493/files/95359731086.pdf
    • https://cdn.shopify.com/s/files/1/0430/7956/5465/files/google_sheets_for_loop.pdf
    • https://cdn.shopify.com/s/files/1/0429/4829/6857/files/69768101506.pdf
    • https://cdn.shopify.com/s/files/1/0433/9276/2006/files/lizanajuzaxiginujituse.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/42820491308.pdf
    • https://cdn.shopify.com/s/files/1/0431/3173/2132/files/american_girl_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/7046/3895/files/56598399105.pdf
    • https://cdn.shopify.com/s/files/1/0427/6820/3942/files/lewugoritowopasekijakasen.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6224/files/jimukufona.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7095/files/angina_pektoris_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/1009/7313/files/38207540285.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_off00006359.bin
5cfdfef51a3075714ba24812953e068a710e4bc97a912147fd332d0f83da0d8e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6359 5248 bytes
font_01_sfnt_off0000751e.bin
26cb4ab7dd496eb6ff30075736a871c1c221d37f6c80133967f24cf3ed672dd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x751E 10024 bytes