Malicious PDF — malware analysis report

Static analysis result for SHA-256 094aea5d078f4f4e…

MALICIOUS

PDF

52.6 KB Created: 2020-08-31 18:50:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5467d34c26a47bd520ce32d8632e436a SHA-1: 038729d71d9436d743c7bebbf5266c7e21d2dbe7 SHA-256: 094aea5d078f4f4ea95d8a865a4ef74166b6c9a0ed350ff7882da2f4a513c001
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on Shopify. One of these links, ttraff.com, is flagged as a malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests the document is part of a link farm or SEO manipulation scheme, potentially leading to malicious content or phishing 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.com/wix?keyword=calamar+gigante+informacion+en+ingles
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/2556/3799/files/84291840045.pdf
    • https://cdn.shopify.com/s/files/1/0432/3016/7203/files/kundalini_reiki_el_kitab.pdf
    • https://cdn.shopify.com/s/files/1/0430/0741/0329/files/autodesk_3ds_max_2020_manual.pdf
    • https://cdn.shopify.com/s/files/1/0433/9613/7111/files/punch_trump_simulator_unblocked.pdf
    • https://static.usrfiles.com/ugd/0511f5_037830d7846f4443a76e9921504255b7.pdf
    • https://static.usrfiles.com/ugd/1813b3_64d825a7718249d4a1f6b6d856641a43.pdf
    • https://static.usrfiles.com/ugd/f96b02_35512faa72d645a78a69e57e9c609a74.pdf
    • https://static.usrfiles.com/ugd/5fd5c1_2622c27289c74049bee1ccdb772e09e6.pdf
    • https://cdn.shopify.com/s/files/1/0428/7633/8335/files/37163760981.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/86593634255.pdf
    • https://cdn.shopify.com/s/files/1/0430/0524/7647/files/63856124060.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008e8c.bin
6bfdbd5aab97392b6bbfadedd40896d29093890afce6ff271a978dbf8c9b794e
pdf-font-stream PDF embedded font (sfnt) at offset 0x8E8C 5104 bytes
font_01_sfnt_off00009fd5.bin
2a453557524327251db0bd0483717ce978cd049306d5561d1a01db9162cac901
pdf-font-stream PDF embedded font (sfnt) at offset 0x9FD5 11232 bytes