Malicious PDF — malware analysis report

Static analysis result for SHA-256 f2b2d699c805bd8e…

MALICIOUS

PDF

43.6 KB Created: 2020-08-31 05:05:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 109288f8da412b9e40a503585f57490c SHA-1: 6c982ab3fa3ed65be3b628ce3bbfa4048b885839 SHA-256: f2b2d699c805bd8eb6f42f86cc81b993d631db513e65838bb8c48560c02b17a2
152 Risk Score

Malware Insights

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

The PDF was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to a known malicious redirector infrastructure at 'ttraff.com'. Another heuristic indicates a PDF link farm, with the first URL pointing to 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same redirector URL and several Shopify URLs, suggesting a coordinated effort to distribute malicious content through a link farm.

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=descargar+la+reina+del+sur+temporada
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/mobugodowawuw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4011/1782/files/48917833664.pdf
    • https://cdn.shopify.com/s/files/1/0437/1808/2709/files/mevimunavekadibul.pdf
    • https://cdn.shopify.com/s/files/1/0431/9854/6084/files/zifomofizuzowibulo.pdf
    • https://cdn.shopify.com/s/files/1/0462/6812/1237/files/danger_alarm_sound_effect.pdf
    • https://static.usrfiles.com/ugd/cc14e4_6c117262251a46ec953416c60e083e15.pdf
    • https://static.usrfiles.com/ugd/e3c460_d3273ba795294b19bac05aa35e0448f6.pdf
    • https://static.usrfiles.com/ugd/b8c837_a920b7bc1d034a669e644b66760c637d.pdf
    • https://cdn.shopify.com/s/files/1/0432/2240/1192/files/zijojijozevozirekomorum.pdf
    • https://cdn.shopify.com/s/files/1/0437/6113/9861/files/41913227665.pdf
    • https://cdn.shopify.com/s/files/1/0446/2097/2195/files/technology_assignment_agreement_template.pdf
    • https://cdn.shopify.com/s/files/1/0430/4112/8601/files/39568926597.pdf
    • https://cdn.shopify.com/s/files/1/0461/0732/8675/files/agnisakshi_serial_audio_songs_free.pdf
    • https://static.usrfiles.com/ugd/f63f29_80e86499c0c541e4a44a43cfd43cece1.pdf
    • https://static.usrfiles.com/ugd/b8c837_80e6448bd0a644cfa627e18fc30edf1b.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_off0000650a.bin
8536dec3d5ea43a84832ad935ba6e53d236022a3a3416fb8b9662613f2f5a5a1
pdf-font-stream PDF embedded font (sfnt) at offset 0x650A 5392 bytes
font_01_sfnt_off0000773e.bin
6d1cc3c28a4b708b42c5ac51fe67dcf85eba0b0914c0d2eecd3c5cc3c606c1d2
pdf-font-stream PDF embedded font (sfnt) at offset 0x773E 13212 bytes