Malicious PDF — malware analysis report

Static analysis result for SHA-256 b0ec95dd5140e513…

MALICIOUS

PDF

42.2 KB Created: 2020-08-22 14:54:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d22b84790a6311d7a3541d55d982d50f SHA-1: 4b1c50d42f4d3fac7797b7e9706dbaec5bf63db1 SHA-256: b0ec95dd5140e513e1745a6e2c30c05d883a88166bf8a5982b9ab84b90a4ac49
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell

The PDF contains a link to a known malicious redirector, ttraff.cc, which is likely used to funnel victims to further malicious content. The document also exhibits characteristics of a PDF link farm, with numerous links pointing to external PDFs, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious, supporting the conclusion that it is designed for malicious redirection.

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=contemplate+auf+deutsch
    • http://files.spoletogreenfun.org/uploads/1/3/0/7/130775053/f229d5458b04d1.pdf
    • http://files.smithpaddleandcanoe.com/uploads/1/3/0/7/130738720/welovufusit.pdf
    • http://sitas.masjidrasoolallah.org/uploads/1/3/1/0/131070374/muvodol-fenosasazosares-kuzululapawe.pdf
    • http://files.ckieffer.com/uploads/1/3/2/7/132710763/8d12ef4eaab78.pdf
    • https://cdn.shopify.com/s/files/1/0432/6722/7811/files/tatikifuvupaf.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/wamepaludewisagobote.pdf
    • https://cdn.shopify.com/s/files/1/0432/6726/0582/files/nureniwixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/2157/4044/files/78472149325.pdf
    • https://cdn.shopify.com/s/files/1/0428/7388/0739/files/distinguish_between_effectiveness_and_efficiency.pdf
    • https://cdn.shopify.com/s/files/1/0439/6512/0670/files/btc_directory.pdf
    • https://cdn.shopify.com/s/files/1/0436/9920/8346/files/37872859827.pdf
    • https://cdn.shopify.com/s/files/1/0429/3066/7673/files/pigabaxalujuxamifuxogov.pdf
    • https://cdn.shopify.com/s/files/1/0433/6464/7077/files/lodojokeganukusawopezexul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/5137558887.pdf
    • https://cdn.shopify.com/s/files/1/0466/3921/8853/files/70842722782.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_off0000658b.bin
b0f4553fd4f2533905f669fc30e351877e36dffe0108a063ac4225388f6f3a17
pdf-font-stream PDF embedded font (sfnt) at offset 0x658B 5204 bytes
font_01_sfnt_off00007716.bin
fcdf6f4c95c5611f4ea690d9b154df000269e108078e81b1a2b01df01e34f52c
pdf-font-stream PDF embedded font (sfnt) at offset 0x7716 10976 bytes