Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa19fca6df834ebf…

MALICIOUS

PDF

37.9 KB Created: 2020-08-13 22:30:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2f8098961be8c601beebde8bd247a8b6 SHA-1: ee0485ae5b5203b0d518eec68da3cdf292b2c151 SHA-256: fa19fca6df834ebf278a8b35b7abb04da04b1b19ac43f96b7d4ee841c70510eb
152 Risk Score

Malware Insights

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

The PDF contains a prominent link that redirects to a malicious URL, disguised as a movie download lure. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for downloading content.

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.cc/pify?keyword=southpaw+full+movie+hd+free
    • http://files.artmark.com/uploads/1/3/1/4/131453506/5861f.pdf
    • http://files.simonwallfisch.com/uploads/1/3/0/7/130775953/merap_zabimuxixalo_fixumos.pdf
    • http://files.edmanphoto.com/uploads/1/3/2/6/132681153/9594284f54d51a2.pdf
    • http://files.genderhealthandhumanrights.com/uploads/1/3/0/8/130814636/gewaxoni-zozebo-gutovaru-pivik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/japakenib.pdf
    • https://cdn.shopify.com/s/files/1/0437/4393/6673/files/47146439702.pdf
    • https://cdn.shopify.com/s/files/1/0431/8999/3636/files/doxarakanalatatu.pdf
    • https://cdn.shopify.com/s/files/1/0429/6926/8373/files/4946383133.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/free_online_games_pogo.pdf
    • https://cdn.shopify.com/s/files/1/0431/7511/6961/files/85034010305.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/bosevajivoduwovawuduti.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/kitofisopotij.pdf
    • https://cdn.shopify.com/s/files/1/0440/1987/5998/files/allahabad_amar_ujala_news_paper.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9030/files/rear_mounted_turbo.pdf
    • https://cdn.shopify.com/s/files/1/0430/8415/2986/files/ripozifetediwifejuzu.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_off000054f2.bin
e27b22d565e9203a8bc2f97add8cd17702b3104513b49031d38a801daf841147
pdf-font-stream PDF embedded font (sfnt) at offset 0x54F2 5360 bytes
font_01_sfnt_off00006723.bin
809fbdafa74b195a080d4bfe205d119610691d3ae10ee1a82a927f591bb239a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x6723 10376 bytes