Malicious PDF — malware analysis report

Static analysis result for SHA-256 330857c4e6754dd8…

MALICIOUS

PDF

47.6 KB Created: 2020-08-12 06:30:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 958dc6a8b3794846f36e3125304f47f7 SHA-1: 3e9d83d8a1c4718402fd039573765e0b08346a2e SHA-256: 330857c4e6754dd8d5db763f2e830785c71e71824df28f3aa4fbe643156d5765
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains the URL 'https://ttraff.com/pify?keyword=boris+johnson+brexit+plan+pdf', suggesting a lure related to political news to entice clicks. The presence of many Shopify-hosted PDF links further supports the SEO link farm heuristic.

Heuristics 3

  • 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.
  • 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/pify?keyword=boris+johnson+brexit+plan+pdf
    • http://files.healingsanctuaryexton.com/uploads/1/3/0/8/130874361/84016dfb8a.pdf
    • http://pasoret.masakoonodera.com/uploads/1/3/1/4/131437508/3844423.pdf
    • http://files.mectacprinstructor.com/uploads/1/3/1/4/131437740/2f469132278.pdf
    • http://files.esaetapi.org/uploads/1/3/2/7/132740580/40226a2.pdf
    • https://cdn.shopify.com/s/files/1/0430/2556/3801/files/java_vector_examples.pdf
    • https://cdn.shopify.com/s/files/1/0433/4449/4750/files/37841735873.pdf
    • https://cdn.shopify.com/s/files/1/0432/8954/2809/files/26731107569.pdf
    • https://cdn.shopify.com/s/files/1/0433/3194/4602/files/english_grammar_lessons_in_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0428/2961/1171/files/zadinovorovazutinawiliza.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/semilexapiwave.pdf
    • https://cdn.shopify.com/s/files/1/0434/2395/7144/files/biwemixeg.pdf
    • https://cdn.shopify.com/s/files/1/0432/0165/9043/files/detexobupusifepowotusi.pdf
    • https://cdn.shopify.com/s/files/1/0452/2721/2957/files/save_webpage_as_firefox_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/0965/4434/files/jazotaposuxoras.pdf
    • https://cdn.shopify.com/s/files/1/0437/8152/1560/files/real_estate_api.pdf
    • https://cdn.shopify.com/s/files/1/0440/7659/7413/files/28542991214.pdf
    • https://cdn.shopify.com/s/files/1/0430/9814/4932/files/23964611356.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_off00007b79.bin
139cafda47ee4490f15b3d77d004f59d2a094581774fff6218c3a58daeb46dba
pdf-font-stream PDF embedded font (sfnt) at offset 0x7B79 5460 bytes
font_01_sfnt_off00008dfd.bin
1b3206c2ea11dd422d9d159f9a5aacae3ac4d65ef9368ba2f9c7f973c43d6268
pdf-font-stream PDF embedded font (sfnt) at offset 0x8DFD 10296 bytes