Malicious PDF — malware analysis report

Static analysis result for SHA-256 7e94aafee0ad66a6…

MALICIOUS

PDF

40.5 KB Created: 2020-08-21 10:20:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0d351b86cc6b31b664eecb28380e3cbd SHA-1: f0550bb057ec64ece95b436cb40a6d9e83727b99 SHA-256: 7e94aafee0ad66a6f8c0bb7e97adcbfc9da0af8f8e36afe94304651d1e50737f
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.com. The document body, though heavily obfuscated, contains text related to 'Poker face glee sheet music pdf' and the malicious URL. The presence of a large number of external PDF links, many hosted on Shopify, suggests a link farm used for SEO poisoning to lure victims. 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.com/pify?keyword=poker+face+glee+sheet+music+pdf
    • http://files.imolagaspar.com/uploads/1/3/2/6/132681426/d529d9e909.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/fafovi.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/bachelor_thesis_proposal.pdf
    • https://cdn.shopify.com/s/files/1/0447/4827/5863/files/japujozakopewebasuvej.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/52038102934.pdf
    • https://cdn.shopify.com/s/files/1/0435/1072/6815/files/64252241742.pdf
    • https://cdn.shopify.com/s/files/1/0435/9097/5647/files/historia_del_alcoholismo_en_mexico.pdf
    • https://cdn.shopify.com/s/files/1/0432/3108/4701/files/bivabenosawipesadugino.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9604/files/26485652266.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/somotapefovib.pdf
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/kudoxifis.pdf
    • https://cdn.shopify.com/s/files/1/0440/8472/3864/files/33276323745.pdf
    • https://cdn.shopify.com/s/files/1/0432/5546/4104/files/91585423262.pdf
    • https://cdn.shopify.com/s/files/1/0430/6049/4490/files/14653597609.pdf
    • https://cdn.shopify.com/s/files/1/0438/3748/9309/files/isometric_view_in_engineering_drawing.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_off00005e53.bin
d6a08739ab0e026aa106c1f1de6b481c8d89140ba291c1662d62f9072c9917e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E53 5636 bytes
font_01_sfnt_off0000715b.bin
bcded02868a240fefbec57236c0f05997e1212d1b6560f0d4b07d9b0c2281f2a
pdf-font-stream PDF embedded font (sfnt) at offset 0x715B 10420 bytes