Malicious PDF — malware analysis report

Static analysis result for SHA-256 016feee6f9b7d2b4…

MALICIOUS

PDF

39.4 KB Created: 2020-08-19 00:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9680b20d5a9e501e9fc5ef7503711542 SHA-1: fe6966e75ecfb951d82d6b4571b22e398142e4fe SHA-256: 016feee6f9b7d2b43763ea582af24493ee772d13756938087aea189e0bdb2da9
154 Risk Score

Malware Insights

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

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link redirects to a known malicious infrastructure at ttraff.ru. The document body, though heavily obfuscated, contains the string 'polycom hdx 4500 datasheet' and the malicious URL, suggesting a lure to disguise the malicious intent. The ML classifier strongly supports the malicious verdict.

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.ru/pify?keyword=polycom+hdx+4500+datasheet
    • http://files.behindthebars.org/uploads/1/3/0/7/130739258/puzikev-gojodekuxes-rogafodavas.pdf
    • http://files.littlelotuscafe.com/uploads/1/3/0/7/130740617/jotusib.pdf
    • http://files.nordicwalkinglondon.com/uploads/1/3/1/4/131437806/zaguk-dimebefir-nivekurixiwo.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0440/7223/9269/files/24682026835.pdf
    • https://cdn.shopify.com/s/files/1/0439/6164/7262/files/wipesogivomodiju.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/2283550224.pdf
    • https://cdn.shopify.com/s/files/1/0435/3127/2346/files/verbal_ability_and_reading_comprehension_by_ajay_singh.pdf
    • https://cdn.shopify.com/s/files/1/0430/2041/9226/files/87597212780.pdf
    • https://cdn.shopify.com/s/files/1/0441/2263/6440/files/illegal_pill_identifier_with_pictures.pdf
    • https://cdn.shopify.com/s/files/1/0434/7202/7814/files/human_sectional_anatomy_ellis.pdf
    • https://cdn.shopify.com/s/files/1/0432/8062/9913/files/waxelabimukamisa.pdf
    • https://cdn.shopify.com/s/files/1/0432/2282/7165/files/21565031501.pdf
    • https://cdn.shopify.com/s/files/1/0438/2159/6834/files/game_of_thrones_minecraft_map.pdf
    • https://cdn.shopify.com/s/files/1/0427/4287/4278/files/sinos.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_off00005932.bin
fb2469f4c58e61587ce5b7bc29045edb5689e910210b6de9d8d8a15c20de576c
pdf-font-stream PDF embedded font (sfnt) at offset 0x5932 5608 bytes
font_01_sfnt_off00006c35.bin
435bd1e46966e8bf9d5b71dd908d353d401ae5d0aadc9f818987ddc37f80ce2d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C35 10792 bytes