Malicious PDF — malware analysis report

Static analysis result for SHA-256 80e890e87d434b07…

MALICIOUS

PDF

47.7 KB Created: 2020-08-27 17:27:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8fe35f741f58ef8e3dfe7d9f8140b7d6 SHA-1: 318fe3e744cb5914008c015e35370a51da2da3f3 SHA-256: 80e890e87d434b07275bd141e357299085e65bf14edd1d3da395692c2fa96968
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though partially corrupted, includes a URL that appears to be a lure for popular media content, suggesting a phishing or scam attempt. The presence of a link farm and a malicious redirector indicates an attempt to drive traffic to potentially harmful sites.

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=where+to+download+nsruto+shippuden+english+dub
    • http://tesiwawa.lacecottage.net/uploads/1/3/1/6/131637814/bigatawoxuse_jinele.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/0247/0305/files/3130818892.pdf
    • https://cdn.shopify.com/s/files/1/0437/8250/4600/files/zitogoxanebidirurezomuxez.pdf
    • https://cdn.shopify.com/s/files/1/0432/3957/1611/files/fivawodum.pdf
    • https://cdn.shopify.com/s/files/1/0428/7430/6727/files/45197966467.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/83583068491.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/96067816862.pdf
    • https://cdn.shopify.com/s/files/1/0429/7408/5279/files/mimojobepamoloduredupomo.pdf
    • https://cdn.shopify.com/s/files/1/0433/7706/6145/files/justin_bieber_video_song_sorry_free.pdf
    • https://cdn.shopify.com/s/files/1/0440/6778/2808/files/how_to_edit_a_large_file_for_free.pdf
    • https://cdn.shopify.com/s/files/1/0437/7749/1093/files/67609146867.pdf
    • https://cdn.shopify.com/s/files/1/0428/9386/9223/files/5810187938.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off000096f8.bin
e688f54698af9683546417128e8c28568070859b5eef302a4ec813546f1fcd2a
decompressed-pdf-stream PDF FlateDecoded stream at offset 0x96F8 17652 bytes
font_00_sfnt_off00005eeb.bin
28ce18d3d6c40da710f4851cf8427fe60a866592a522b0e88573f8f416a53286
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EEB 5468 bytes
font_01_sfnt_off00007187.bin
0d1691938a00930d4cb22205f021c4cedfe75a4504c21e7f17b282ce09621748
pdf-font-stream PDF embedded font (sfnt) at offset 0x7187 11432 bytes