Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e2e8175d62f9a1d…

MALICIOUS

PDF

39.4 KB Created: 2020-08-23 01:15:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11e2d8a3b67567867b0aedb194eea58b SHA-1: 77e6b1965c9658ee211b8923413e75eb4fb3a00b SHA-256: 8e2e8175d62f9a1dd3b4df5da37adb844640ef00e68d0c16ce8eb3feeda62046
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify-hosted PDFs, characteristic of a link farm. One critical heuristic indicates a malicious redirector link to 'ttraff.com'. The ML classifier also strongly flagged this PDF as malicious. The presence of a link farm suggests an attempt to distribute malicious content or conduct phishing by overwhelming search engines or users with numerous seemingly benign links, with at least one leading to a malicious destination.

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/pify?keyword=hypnotic+guided+imagery
    • http://zavividu.finleysva.com/uploads/1/3/0/7/130776433/3278787.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/pamarujesikew.pdf
    • https://cdn.shopify.com/s/files/1/0435/2563/6248/files/wolurajugudoxug.pdf
    • https://cdn.shopify.com/s/files/1/0432/2371/1903/files/bsl_fingerspelling_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0437/6369/5770/files/38314056335.pdf
    • https://cdn.shopify.com/s/files/1/0434/1645/3272/files/9914113638.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9461/files/85338690259.pdf
    • https://cdn.shopify.com/s/files/1/0434/7245/3797/files/dynamics_of_machinery_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0437/8561/7570/files/build_my_life_chords_in_e.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3949/files/risidigujepeme.pdf
    • https://cdn.shopify.com/s/files/1/0433/3250/1656/files/asepsie_et_antisepsie.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/how_to_enable_screen_share_on_discord.pdf
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/rurunonigenezuviguberufa.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_off00005e4b.bin
c344c893355529151aef15d2c8d84b0ff7ca81c4b79c6db9e00c665e7d18d47f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E4B 5248 bytes
font_01_sfnt_off00007007.bin
23199afe3107f7a3b2245dedd66578a19b6b8084a2ca88ba3084810c76ba32ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x7007 9812 bytes