Malicious PDF — malware analysis report

Static analysis result for SHA-256 e56ad2f5edb7bfa0…

MALICIOUS

PDF

35.2 KB Created: 2020-09-08 22:24:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1d23d67eb5d22db03f358b55beb9d834 SHA-1: 7c53cbc0ce8bf89a69fcbf05a706e55dc8755979 SHA-256: e56ad2f5edb7bfa002965de3b41ae2b5cfe01c6be96f4e1a08bb03d1fcaa39e6
152 Risk Score

Malware Insights

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

The PDF document contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link redirects to known malicious infrastructure at 'ttraff.me'. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious 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.me/wix?keyword=platform+bed+frame+queen+no+headboard
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/timex_nature_sounds_alarm_clock_t276b_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6371/3690/files/jspdf_autotable_angular_example.pdf
    • https://cdn.shopify.com/s/files/1/0460/1407/0945/files/diploma_automobile_engineering_text_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/8120/3861/files/renodabobasadagujigezu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaragevutaxesidep.pdf
    • https://static.usrfiles.com/ugd/b5472a_19c6c5d0315d4c7e8cb152c4a5314580.pdf
    • https://static.usrfiles.com/ugd/b0cb2d_db1e4e6817574b51b898acb4446269fc.pdf
    • https://static.usrfiles.com/ugd/704f6c_06f17b161c7a472c96c7182967aff538.pdf
    • https://static.usrfiles.com/ugd/57c819_7369a414a10c4fe1b9c5fa28296a5603.pdf
    • https://static.usrfiles.com/ugd/cc15ef_b428aaa5bfd4443d944beb5398ba4641.pdf
    • https://static.usrfiles.com/ugd/5de1df_24426190ebaf4ad286aa156ca344119e.pdf
    • https://static.usrfiles.com/ugd/96768c_ded0c0ea216a4d7d982b1b65d645d2b9.pdf
    • https://cdn.shopify.com/s/files/1/0429/7926/2623/files/31246412991.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/mathematical_operations.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_off00004bb4.bin
d45a40135ea09950a1398b47de2da6733ae357e20181fb02dd56f813fc8b52ae
pdf-font-stream PDF embedded font (sfnt) at offset 0x4BB4 5236 bytes
font_01_sfnt_off00005d51.bin
00614b2fddd5641881c8a6be91a019e6d2f41e5aacd53eac53bf06d69e6d9cd8
pdf-font-stream PDF embedded font (sfnt) at offset 0x5D51 10152 bytes