Malicious PDF — malware analysis report

Static analysis result for SHA-256 d15e183b06f8ed01…

MALICIOUS

PDF

41.4 KB Created: 2020-08-26 12:56:30 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: cfc76e8b5a6f2bf5cb792c750b452e0d SHA-1: fd6b02069b9c7498c41f3c581d236c216d6a3554 SHA-256: d15e183b06f8ed01900c6fbd861fccc99e6ccf93dc91ecda804781b39548b231
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This indicates a link farm or SEO poisoning attack designed to lure users to malicious infrastructure. The ML classifier also strongly flagged this PDF as malicious.

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=what+is+intertextuality
    • http://bebinum.mattsuper.com/uploads/1/3/0/7/130739655/7371721.pdf
    • http://xawote.fremontclassof72.com/uploads/1/3/0/7/130775795/jigokuxizuvil.pdf
    • https://cdn.shopify.com/s/files/1/0433/8155/5350/files/calculix_for_windows.pdf
    • https://cdn.shopify.com/s/files/1/0456/5270/5447/files/sejetori.pdf
    • https://cdn.shopify.com/s/files/1/0433/0664/7717/files/dhol_baje_re_gamit_song.pdf
    • https://cdn.shopify.com/s/files/1/0432/5759/4016/files/35873057739.pdf
    • https://cdn.shopify.com/s/files/1/0440/8524/8165/files/24367135380.pdf
    • https://cdn.shopify.com/s/files/1/0439/2553/6936/files/how_to_cancel_guideposts_subscription.pdf
    • https://cdn.shopify.com/s/files/1/0433/4790/2622/files/ecrits_apocryphes_chrtiens_tome_1.pdf
    • https://cdn.shopify.com/s/files/1/0434/0993/2439/files/linkedin_share_buttons.pdf
    • https://cdn.shopify.com/s/files/1/0437/6284/3797/files/linear_algebra_and_differential_equations_peterson.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_off00006684.bin
b994fca3fc2809ae6fe4a4d4d274b82f80341cd2ce76521800090d1c910c3ef2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 4956 bytes
font_01_sfnt_off00007764.bin
0772d3351494e1b9c5e81bdc8343fa1f4e21e734514eb74136ffdfb9b2e2a6d4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7764 10060 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.