Malicious PDF — malware analysis report

Static analysis result for SHA-256 d4c058fc8a4e263d…

MALICIOUS

PDF

40.5 KB Created: 2020-09-01 11:13:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f19a5209b2461050291326ab60487fe1 SHA-1: d806b1387cc2a86af13e45ef45e8aac212c799ed SHA-256: d4c058fc8a4e263df04d40cfdd61fea837117d1917f5facec72bf3bfdeb4740c
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. The document body, though heavily obfuscated, contains references to 'oecd privacy guidelines pdf' and the malicious URL, suggesting a lure. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many of which point to Shopify domains hosting other PDFs.

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.com/wix?keyword=oecd+privacy+guidelines+pdf
    • https://cdn.shopify.com/s/files/1/0431/6315/6641/files/vitimuwiwejimodivajamuvub.pdf
    • https://cdn.shopify.com/s/files/1/0434/8579/0358/files/erros_na_administrao_de_medicamentos.pdf
    • https://cdn.shopify.com/s/files/1/0429/8709/4177/files/givubitujasobolozemur.pdf
    • https://static.usrfiles.com/ugd/1849a1_e2b5ee743f77430ab55c192de7a2a066.pdf
    • https://static.usrfiles.com/ugd/cafc24_c36b48a32a034ca7bcb888545975c429.pdf
    • https://static.usrfiles.com/ugd/6cf392_c52e1d475d5849308cf609849abac2d1.pdf
    • https://static.usrfiles.com/ugd/b50c55_2bb537a19d994c1f84b061ff283959d5.pdf
    • https://static.usrfiles.com/ugd/aff7ca_1d051e8ab7d64273890d94374b49b153.pdf
    • https://static.usrfiles.com/ugd/221f3a_9e8f8ead8ee047bdad974a0f6178ab0d.pdf
    • https://static.usrfiles.com/ugd/0f5b72_9fd2b480241642daa9b3528071e543d5.pdf
    • https://static.usrfiles.com/ugd/b58d21_5395cc337df34981a13b4e842952fd95.pdf
    • https://static.usrfiles.com/ugd/83d902_eba808af22fd41b89f04dc331da5f9d0.pdf
    • https://static.usrfiles.com/ugd/895bef_ad103e6d76454f34a7a28948fd3cb01c.pdf
    • https://cdn.shopify.com/s/files/1/0428/8688/9639/files/poxila.pdf
    • https://cdn.shopify.com/s/files/1/0430/0881/9349/files/runijedetofekupiba.pdf
    • https://cdn.shopify.com/s/files/1/0428/5199/1719/files/tinkers_construct_guide_shuriken.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_off00006086.bin
b1c6e20364950e0d54182b4cb9ea332e6e92b2da840dc0b7b6c87c6077a3b7ac
pdf-font-stream PDF embedded font (sfnt) at offset 0x6086 5512 bytes
font_01_sfnt_off00007360.bin
c8c62e0541d63ebf2ec7184d392fe4d90b50f275ddd2ab5414873d16e84272e6
pdf-font-stream PDF embedded font (sfnt) at offset 0x7360 9964 bytes