Malicious PDF — malware analysis report

Static analysis result for SHA-256 49609976fcf801be…

MALICIOUS

PDF

45.2 KB Created: 2020-10-18 06:00:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c99da41c2373b4394a3768b48c04753a SHA-1: 17ebbdc42708bce3eb648b28bd7de3b94ec72ef5 SHA-256: 49609976fcf801bec305f09cfd10b6beeb41aa2c2acfdce7c7d999afb3b03bd5
152 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.me, disguised as instructions for a 'Werner ladder leveler'. The PDF also contains a large number of links to other PDFs hosted on striking.ly and weebly.com, suggesting a link farm or SEO poisoning attempt to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious.

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.me/123?keyword=werner+ladder+leveler+instructions
    • https://zesopupejilit.weebly.com/uploads/1/3/0/7/130738861/992572.pdf
    • https://vodipewelo.weebly.com/uploads/1/3/1/6/131637384/576ff6.pdf
    • https://tejigenunonim.weebly.com/uploads/1/3/0/8/130813632/9085281.pdf
    • https://xonuvalax.weebly.com/uploads/1/3/1/4/131437330/df3e8.pdf
    • https://fadusoga.weebly.com/uploads/1/3/0/7/130739873/lurilu.pdf
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/1000608.pdf
    • https://femitinekabel.weebly.com/uploads/1/3/1/4/131437683/buxofalujizopi.pdf
    • https://varipejat.weebly.com/uploads/1/3/0/7/130739080/tolatadubezi.pdf
    • https://uploads.strikinglycdn.com/files/38b6fcc2-d5a5-4ad5-ba89-1a8a6951c550/golok.pdf
    • https://uploads.strikinglycdn.com/files/8411618d-8089-4c23-a352-e214d45374b4/vukuvozanekapix.pdf
    • https://uploads.strikinglycdn.com/files/336d10f2-8024-4b4a-a0e2-8a54a5f27ad9/travelling_initiatory_journey_and_exile.pdf
    • https://uploads.strikinglycdn.com/files/8c58f6c3-7b30-4d40-8842-10325bb04912/48015326628.pdf
    • https://uploads.strikinglycdn.com/files/9dfea99b-4f8e-48d8-9420-2bfbd322ac16/zazulatirukimiru.pdf
    • https://uploads.strikinglycdn.com/files/697ca36e-93e8-48be-a021-f7219fb01f4b/fusopuke.pdf
    • https://uploads.strikinglycdn.com/files/bb166f86-393d-4960-9ff5-5adb3a9c7ab6/lakilax.pdf
    • https://cdn.shopify.com/s/files/1/0266/8177/0155/files/zozosage.pdf
    • https://cdn.shopify.com/s/files/1/0434/3437/7377/files/new_testament_teacher_manual.pdf
    • https://cdn.shopify.com/s/files/1/0495/4714/9464/files/elton_john_mn_tour_2020.pdf
    • https://cdn.shopify.com/s/files/1/0495/5386/6919/files/dipobetutebetaz.pdf
    • https://cdn.shopify.com/s/files/1/0439/4916/2654/files/aroma_rice_cooker_instructions_4_cup.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_off000073b2.bin
265f39abe407f86f696e8e58e94822ad2b1cb1e1fcbc3c38df487c248378d9c0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73B2 5004 bytes
font_01_sfnt_off000084cd.bin
9a8703bcf061f7806df08ad75a888b4f8846a8de3bda73123490d978d502e4ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84CD 10136 bytes

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