Malicious PDF — malware analysis report

Static analysis result for SHA-256 d73ee6f48cb186bc…

MALICIOUS

PDF

78.8 KB Created: 2020-08-05 15:53:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c71612dacaa679a1503da41e6b85797b SHA-1: 5ebd574b61eecc327386965c63caf0efc022bbf0 SHA-256: d73ee6f48cb186bc30a94edadca852941fd1fd45543c035fc3543c63a58434ef
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, contains the same malicious URL and several other Shopify-hosted PDF links, suggesting a lure to a malicious site disguised as a document.

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=english+phonetic+spelling+alphabet+pdf
    • http://files.kaylamakeuppro.com/uploads/1/3/0/8/130874588/5355219.pdf
    • http://files.karuturi.com/uploads/1/3/0/7/130776255/puguwalafalopasogezi.pdf
    • http://files.equityallies.org/uploads/1/3/1/4/131408970/meveka-vigugadomo-wavojal-laleb.pdf
    • https://cdn.shopify.com/s/files/1/0447/4486/7994/files/theiving_training_osrs.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6141/files/relujuzezemovuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/6450/0122/files/bioavailability_enhancement_techniques.pdf
    • https://cdn.shopify.com/s/files/1/0437/2401/3722/files/romedefafozile.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/denikiv.pdf
    • https://cdn.shopify.com/s/files/1/0430/8815/0690/files/zemidege.pdf
    • https://cdn.shopify.com/s/files/1/0431/1482/3844/files/45861992076.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0432/8819/9332/files/mejoritirimiputoxejugodun.pdf
    • https://cdn.shopify.com/s/files/1/0430/3876/9303/files/fufumorerisigujobukujade.pdf
    • https://cdn.shopify.com/s/files/1/0440/0722/7542/files/convert_wma_to_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0428/6346/0508/files/84618678115.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_off0000e052.bin
a98279bd22da64234f894afe3ca2eafe8d23c58c4e1d12d77473dcc1e076561f
pdf-font-stream PDF embedded font (sfnt) at offset 0xE052 5420 bytes
font_01_sfnt_off0000f2be.bin
f4c3773555c3bfc7504377ac446dafed88cefe47ee9b9aaaafcb2437bea39ab6
pdf-font-stream PDF embedded font (sfnt) at offset 0xF2BE 20508 bytes