Malicious PDF — malware analysis report

Static analysis result for SHA-256 97de3390994c51fa…

MALICIOUS

PDF

40.7 KB Created: 2020-08-12 16:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f6ef41a1f09e85d09b50058f15b92c12 SHA-1: e8cc0cb1ada2a80d50c7009d47a780fd6a902ce2 SHA-256: 97de3390994c51fa68338785a6b480644db534b311686c1c6b0b6f4ec6d26ec1
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains numerous embedded links. One critical heuristic identified a link to known malicious redirector infrastructure at https://ttraff.ru/pify?keyword=beach+boy+ardashir+vakil+pdf. Another critical heuristic indicated a PDF link farm with 30 external PDF links, many hosted on cdn.shopify.com. The document body contains text related to 'beach boy ardashir vakil pdf' and the authoring application 'wkhtmltopdf', suggesting a lure document designed to host a large number of links for SEO poisoning or to distribute 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=beach+boy+ardashir+vakil+pdf
    • http://ripurij.studiogoddess.com/uploads/1/3/2/6/132695569/3048033.pdf
    • http://files.alanbirtwistle.com/uploads/1/3/1/3/131383664/werox_xapedewero_bemidituziv_zurer.pdf
    • http://files.areyoureallybringinghim.com/uploads/1/3/1/1/131164519/lijodogoxixe.pdf
    • https://cdn.shopify.com/s/files/1/0429/5009/9107/files/melovopidavu.pdf
    • https://cdn.shopify.com/s/files/1/0440/6332/6358/files/adobe_cs6_keygen.pdf
    • https://cdn.shopify.com/s/files/1/0438/8156/2280/files/9342029482.pdf
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/xumidaselisaladalo.pdf
    • https://cdn.shopify.com/s/files/1/0431/5086/8646/files/52118301439.pdf
    • https://cdn.shopify.com/s/files/1/0434/6249/2310/files/xipevu.pdf
    • https://cdn.shopify.com/s/files/1/0429/5049/2316/files/danoluxi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/dovaxetudomorunuk.pdf
    • https://cdn.shopify.com/s/files/1/0427/6181/4172/files/cellular_injury_and_adaptation.pdf
    • https://cdn.shopify.com/s/files/1/0432/1017/8717/files/23777668889.pdf
    • https://cdn.shopify.com/s/files/1/0430/5597/2501/files/canterbury_tales_the_miller_s_tale.pdf
    • https://cdn.shopify.com/s/files/1/0427/4018/7303/files/69868444849.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_off0000613c.bin
a01b20e1dbbc7def950f9cf5c87eea4bf52b9004522ae52496214a4fec114f81		 pdf-font-stream PDF embedded font (sfnt) at offset 0x613C 5656 bytes
font_01_sfnt_off00007473.bin
17933fbe860265c72f84fffddb2e85e0b4f00fcf6d2e14bbdcbc5d7908ded7a3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7473 9816 bytes

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