Malicious PDF — malware analysis report

Static analysis result for SHA-256 7c3988b563a9f8ac…

MALICIOUS

PDF

43.3 KB Created: 2020-08-29 06:04:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e387a42c6c0308c05241d82165d14fe9 SHA-1: 2f82e718eea98d5996d05dc071db32e266d6a687 SHA-256: 7c3988b563a9f8ac45e3709fed00a4f43d6fba7af87ba598fc4c6efc67a4178b
154 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, identified as a 'PDF_SEO_LINK_FARM' heuristic. One of these links, 'https://ttraff.cc/wix?keyword=ingenuity+lion+king+swing+weight+limit', is flagged as a malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting it is the primary lure. 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.cc/wix?keyword=ingenuity+lion+king+swing+weight+limit
    • https://static.usrfiles.com/ugd/b8c837_1e7a4bebcde24c5bb37706e604b3668f.pdf
    • https://static.usrfiles.com/ugd/b8c837_f0c8a16ae9fd42148cd2b3a92c7fa96d.pdf
    • https://static.usrfiles.com/ugd/b8c837_d75f477f5cdd4ccfa9ca40fb59964d92.pdf
    • https://static.usrfiles.com/ugd/b8c837_e687bd6877354514be288505e5b4670b.pdf
    • https://cdn.shopify.com/s/files/1/0429/0658/3203/files/sawikaxirewibonakax.pdf
    • https://cdn.shopify.com/s/files/1/0437/0916/9815/files/jigav.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/989773719.pdf
    • https://cdn.shopify.com/s/files/1/0433/1179/2286/files/13857073149.pdf
    • https://cdn.shopify.com/s/files/1/0432/6676/9054/files/sagen.pdf
    • https://cdn.shopify.com/s/files/1/0431/2530/9601/files/negedekeb.pdf
    • https://static.usrfiles.com/ugd/b8c837_294bdf10fbdf4bb1b8ea1ae9bf76877d.pdf
    • https://static.usrfiles.com/ugd/b8c837_588d24831d0d4f7ca37ccbc5fb22e7ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_b51c96207ff748869eea4b0dcbe50a33.pdf
    • https://static.usrfiles.com/ugd/b8c837_00d44119059045af8d821055747431c7.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005b9f.bin
6752fb0fde9b92d086e77f36182047021cf90e7cc5ddabeeefe0b8164ec27907
pdf-font-stream PDF embedded font (sfnt) at offset 0x5B9F 4868 bytes
font_01_sfnt_off00006c23.bin
edcbd0d8d74260709d5ec841f3ad5ff4a2f99e208d62465fa3c55b32fa76060d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C23 10628 bytes
font_02_sfnt_off0000908b.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x908B 4324 bytes