Malicious PDF — malware analysis report

Static analysis result for SHA-256 417689983281e3bd…

MALICIOUS

PDF

43.6 KB Created: 2020-08-30 21:16:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 24b102d55ab8aa1d81409b71cee8a6f3 SHA-1: 5ba1625938cd4a279e8c941150993faac3b86999 SHA-256: 417689983281e3bdd403098626a236c517b412ab417a80097cf0ddee472db35f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.cc, which is disguised as information about a 'Halo smart smoke co alarm'. The document also exhibits characteristics of a link farm, with numerous embedded URLs pointing to external PDFs, likely for SEO manipulation or to host further malicious content. The ML classifier 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=halo+smart+smoke+co+alarm
    • https://static.usrfiles.com/ugd/0511f5_3dba3174637b4dc999e42a4499c3ffa9.pdf
    • https://static.usrfiles.com/ugd/b8c837_52f3afe6cc2a4343b50c8456402e07f7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0059d019dd9447f2a0ece78b553d13f6.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_7a88d77af11442b4910856175af3f6de.pdf
    • https://static.usrfiles.com/ugd/b8c837_8fceaaa1632c40bc88331856942a8cb0.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/winoxilerudizixadejugo.pdf
    • https://cdn.shopify.com/s/files/1/0434/3300/1126/files/are_roblox_exploits_viruses.pdf
    • https://cdn.shopify.com/s/files/1/0440/1178/2309/files/wofelaxitovudemegevan.pdf
    • https://cdn.shopify.com/s/files/1/0433/0569/7438/files/these_systems_are_used_in_managing_d.pdf
    • https://cdn.shopify.com/s/files/1/0432/8249/7701/files/66160441519.pdf
    • https://cdn.shopify.com/s/files/1/0433/6078/0443/files/sebusejojirojozalated.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/soxubijizopuwegikotiguse.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_off0000606f.bin
8259f213633f1a0da0c6d9138e5c8783664305fa5568682faab5e453e83bb454
pdf-font-stream PDF embedded font (sfnt) at offset 0x606F 4604 bytes
font_01_sfnt_off0000700e.bin
fd6c1b041f8dacfef00371ff3f8e10b6d5746bf323841894f61b214cdb96d0ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x700E 10340 bytes
font_02_sfnt_off0000937f.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3
pdf-font-stream PDF embedded font (sfnt) at offset 0x937F 4324 bytes