Malicious PDF — malware analysis report

Static analysis result for SHA-256 faaaaeb75e687945…

MALICIOUS

PDF

39.8 KB Created: 2020-08-31 02:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 105aba2a4d7ee62ac48289eb93603947 SHA-1: 963d050625f41b59c151a36fc1435fc890d0fd06 SHA-256: faaaaeb75e687945c35f31427d503cd85c1b0116bde4c9053ef558c88dfabe70
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, 'https://ttraff.cc/wix?keyword=ryobi+s430+operator%2527s+manual', which is disguised as a manual. This suggests a social engineering tactic to trick users into clicking the link. The presence of a large number of external PDF links also indicates a link farm, likely for SEO manipulation or to distribute malicious content. The ML classifier 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.cc/wix?keyword=ryobi+s430+operator%2527s+manual
    • https://static.usrfiles.com/ugd/b8c837_3bb4fb37272b406da07ab29a57205220.pdf
    • https://static.usrfiles.com/ugd/4d935e_a3845302097c4cb3ada6ee84964490f9.pdf
    • https://static.usrfiles.com/ugd/b8c837_978807e56de54f349a07b62d60a29d97.pdf
    • https://static.usrfiles.com/ugd/b8c837_7ab2735ed65648c4a259943546cac86a.pdf
    • https://static.usrfiles.com/ugd/cd79e3_70418ddce52d4251bd0adc1d5055ca9b.pdf
    • https://static.usrfiles.com/ugd/2ac701_52aa04e018444b8ab853cdaa8b073cb4.pdf
    • https://static.usrfiles.com/ugd/0c4177_70323786e90e4cfc923af981a3748d8d.pdf
    • https://static.usrfiles.com/ugd/cac9e4_dc6a09b30d994a3283ae9b07364da57c.pdf
    • https://cdn.shopify.com/s/files/1/0437/6834/8829/files/21572571838.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4658/files/a_to_z_hindi_songs.pdf
    • https://cdn.shopify.com/s/files/1/0430/9309/8660/files/neet_syllabus_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/4233/2057/files/63015445030.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lamafavikunidamekisuf.pdf
    • https://cdn.shopify.com/s/files/1/0435/7393/6291/files/nipexojezexerakeme.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_off00005d0c.bin
99394a659f76977e0da5f07a06cd28d5e7aa37fbbbc3272b04993b2b90dba8fb
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D0C 5644 bytes
font_01_sfnt_off00007029.bin
8d57cebfc2d25b4d49b7e494f58b971082396d282fa102aa8596d160d2d655c8
pdf-font-stream PDF embedded font (sfnt) at offset 0x7029 10104 bytes