Malicious PDF — malware analysis report

Static analysis result for SHA-256 a59e51e05022e4ef…

MALICIOUS

PDF

37.9 KB Created: 2020-07-28 01:26:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1aa75279191ec4fc02317492cd3de369 SHA-1: 7925afdf890dd2c16a05b137287b74900c0e3d1c SHA-256: a59e51e05022e4ef029a3af572598f467b311c67e8d946d053742740f6323c19
152 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, directing users to 'ttraff.cc'. Additionally, it exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs hosted on domains like 'cdn.shopify.com'. The document body, though partially corrupted, contains text related to a weather report, suggesting a lure to disguise the malicious intent of redirecting users to potentially harmful sites.

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.cc/pify?keyword=gangtok+current+weather+report
    • http://files.mrwince.com/uploads/1/3/0/7/130739811/4ddb429eb4f2efa.pdf
    • http://files.trailfix.ca/uploads/1/3/0/7/130739309/faruna.pdf
    • http://files.melissaphotographydesign.com/uploads/1/3/0/8/130874489/jixiwijowi_sinabumorebo_gagakivadoj_fijuga.pdf
    • http://files.science1helpsite.com/uploads/1/3/0/7/130738852/napojibobojalibebez.pdf
    • http://files.illinoisequinefieldservice.com/uploads/1/3/2/6/132680808/wetolapevuwekaf.pdf
    • http://files.science1helpsite.com/up
    • https://cdn.shopify.com/s/files/1/0437/9849/5389/files/gizegibogubosenixonowaka.pdf
    • https://cdn.shopify.com/s/files/1/0439/2783/0696/files/wedujazupanajir.pdf
    • https://cdn.shopify.com/s/files/1/0431/1502/0448/files/lakowamejidufepivijiv.pdf
    • https://cdn.shopify.com/s/files/1/0431/9094/3901/files/47662770949.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4477/files/26370338926.pdf
    • https://cdn.shopify.com/s/files/1/0433/9580/9431/files/49760857122.pdf
    • https://cdn.shopify.com/s/files/1/0432/0968/7208/files/31709739247.pdf
    • https://cdn.shopify.com/s/files/1/0429/5570/2425/files/janulovogegoben.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/nomovupilepodujo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5365/9798/files/dadoxapazobenibaser.pdf
    • https://cdn.shopify.com/s/files/1/0434/6540/8662/files/6554334739.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_off00005704.bin
e051cba0aa7320bc758806a0c14c32b1c6ec31d9281aef98a763d9d2a77e5cd2
pdf-font-stream PDF embedded font (sfnt) at offset 0x5704 5008 bytes
font_01_sfnt_off0000681e.bin
858269606c2ff61ca1ef394de5c0ee925e727d01ef4b39107e7e158519d5d19d
pdf-font-stream PDF embedded font (sfnt) at offset 0x681E 9984 bytes