Malicious PDF — malware analysis report

Static analysis result for SHA-256 dde12ae531221184…

MALICIOUS

PDF

46.6 KB Created: 2020-07-27 04:38:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fcd18217893b0bfaffd376e2dd4141bb SHA-1: 30320b084d64ecff70387e27220b18b535aaba0e SHA-256: dde12ae531221184322c5ee159b3bf6eae114e88e00bf4955c72ce37b454a204
152 Risk Score

Malware Insights

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

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 Shopify. The ML classifier strongly flagged this PDF as malicious. The document body contains garbled text but includes the phrase 'Ciao adios anne marie mp4', which may be a lure.

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=ciao+adios+anne+marie+mp4
    • http://files.hbsubculture.com/uploads/1/3/0/7/130738621/6284164.pdf
    • http://files.russellhomestead.com/uploads/1/3/1/4/131453065/8835137.pdf
    • http://files.8lue4rt.com/uploads/1/3/1/4/131407152/769874.pdf
    • http://files.allisonmcintyreart.com/uploads/1/3/2/7/132740285/6863451.pdf
    • http://files.allisonmcintyreart.com/uploads/1/3/2/7/
    • https://cdn.shopify.com/s/files/1/0435/0305/9110/files/233028584.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/22893269325.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/29233708743.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/nomavewe.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/27482348981.pdf
    • https://cdn.shopify.com/s/files/1/0432/3603/2680/files/filexowidorixusozoponunu.pdf
    • https://cdn.shopify.com/s/files/1/0429/8106/4853/files/fusajepevawajuwe.pdf
    • https://cdn.shopify.com/s/files/1/0437/2103/1832/files/vubozetekobatix.pdf
    • https://cdn.shopify.com/s/files/1/0428/9685/1111/files/torururotusebuxipa.pdf
    • https://cdn.shopify.com/s/files/1/0439/3605/5454/files/mobelotimofod.pdf
    • https://cdn.shopify.com/s/files/1/0431/4244/7265/files/fomunabefiki.pdf
    • https://cdn.shopify.com/s/files/1/0434/7396/1125/files/7774275047.pdf
    • https://cdn.shopify.com/s/files/1/0428/5949/5590/files/rulepugixibesilo.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_off00007061.bin
bbefb14ce514fe6029082fcc6dfeba3ec3d225e8802b0f6477ef52ed56ce831c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7061 4892 bytes
font_01_sfnt_off000080df.bin
dd8454b2c41bda1b068e9c05c1df377709dc0dab7f823907f3656a418ee0f379
pdf-font-stream PDF embedded font (sfnt) at offset 0x80DF 14308 bytes