Malicious PDF — malware analysis report

Static analysis result for SHA-256 ced661801b24ec91…

MALICIOUS

PDF

44.9 KB Created: 2020-07-30 07:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 11effee837ad786db23cfc179548b013 SHA-1: f01206287a00794c7b44cba533c8c0ac494cfa37 SHA-256: ced661801b24ec91c8bc7894e18fd04b31431b0b8c23384437af360ce49cf428
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it exhibits characteristics of a PDF link farm, with numerous external links, many hosted on cdn.shopify.com. The primary malicious URL identified is ttraff.ru, which likely serves as a gateway to further malicious content.

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.ru/pify?keyword=d+d+artificer+3.+5+pdf
    • http://files.inspiretkd.com/uploads/1/3/0/8/130874205/b36e77a9360.pdf
    • http://files.operationbluepride.org/uploads/1/3/2/6/132681836/2904233.pdf
    • http://files.ibizawalkingassociation.com/uploads/1/3/0/8/130874118/2978a99274.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6015/files/fabujuzerijajakates.pdf
    • https://cdn.shopify.com/s/files/1/0431/0928/6050/files/22368797195.pdf
    • https://cdn.shopify.com/s/files/1/0435/5578/2819/files/bijunosisago.pdf
    • https://cdn.shopify.com/s/files/1/0433/5514/4347/files/vitulitib.pdf
    • https://cdn.shopify.com/s/files/1/0433/5714/3199/files/dikipizoterexowogejef.pdf
    • https://cdn.shopify.com/s/files/1/0433/5602/9093/files/21363102292.pdf
    • https://cdn.shopify.com/s/files/1/0434/6878/3782/files/petelesofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/5331/7272/files/jolenukugefu.pdf
    • https://cdn.shopify.com/s/files/1/0432/1922/2687/files/debukawunutin.pdf
    • https://cdn.shopify.com/s/files/1/0431/7190/5698/files/12697595971.pdf
    • https://cdn.shopify.com/s/files/1/0427/5650/5756/files/94202985364.pdf
    • https://cdn.shopify.com/s/files/1/0436/1139/0115/files/junupavipu.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_off0000744c.bin
a9199746c630b6e119bce99473b89ff392b26f078758407155309a6871a410d0
pdf-font-stream PDF embedded font (sfnt) at offset 0x744C 4828 bytes
font_01_sfnt_off000084d7.bin
450c61bddb4761dcc14d1dd10c2f85b53992745f4a9ce1e43db4bb61e5aecd87
pdf-font-stream PDF embedded font (sfnt) at offset 0x84D7 9880 bytes