Malicious PDF — malware analysis report

Static analysis result for SHA-256 9ce9a543cb2c0e7d…

MALICIOUS

PDF

54.9 KB Created: 2020-08-19 15:23:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2cdcde0ae2474f9bcc0706827fb6e36a SHA-1: ffb23ca625932cb7bccb8f482d45061def44709c SHA-256: 9ce9a543cb2c0e7d5e05d895365d9c930b004b1c251a0a93b3f5e4135593b4d7
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning classifier as malicious and contains a large number of embedded links. One critical heuristic identified a link to a known malicious redirector service, ttraff.com, which likely serves to obscure the final malicious payload. The document body contains garbled text and embedded URLs, suggesting it is not intended for legitimate user consumption but rather as a lure or delivery mechanism.

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=banjara+ek+villain+movie+video+song
    • http://files.brasecollection.com.au/uploads/1/3/1/4/131438397/785085.pdf
    • http://files.nanasnotwhatsandlagniappe.com/uploads/1/3/0/9/130969470/lifofobipujakip.pdf
    • http://files.harvestvalleychurch.com/uploads/1/3/2/6/132682684/judofonipo.pdf
    • http://puvedov.mndnorthwiltshire.org.uk/uploads/1/3/2/6/132681464/duvugejivitij.pdf
    • http://files.beautykittytrainingacademy.com/uploads/1/3/0/7/130775229/8bd5b921b0.pdf
    • https://cdn.shopify.com/s/files/1/0435/0499/2408/files/9040406983.pdf
    • https://cdn.shopify.com/s/files/1/0431/4667/4330/files/arboricultural_impact_assessment.pdf
    • https://cdn.shopify.com/s/files/1/0437/9826/6018/files/branding_identity_mockup_templates.pdf
    • https://cdn.shopify.com/s/files/1/0432/2358/0831/files/11809741095.pdf
    • https://cdn.shopify.com/s/files/1/0428/1093/3414/files/nubifi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5483/3564/files/kivuludefugofi.pdf
    • https://cdn.shopify.com/s/files/1/0438/4620/5602/files/5086465930.pdf
    • https://cdn.shopify.com/s/files/1/0429/5272/0543/files/kurujupusoxo.pdf
    • https://cdn.shopify.com/s/files/1/0427/3196/2535/files/79669578686.pdf
    • https://cdn.shopify.com/s/files/1/0429/2011/6380/files/56955600187.pdf
    • https://cdn.shopify.com/s/files/1/0431/0266/6906/files/sinowurefepizokenusemupas.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_off00009922.bin
25bcd7ca28b3a01c030f90c5d4653365fd2db5632a40756c25f4b0ec63b7217f
pdf-font-stream PDF embedded font (sfnt) at offset 0x9922 5396 bytes
font_01_sfnt_off0000ab6f.bin
4eab2c158ca893f999976ed99729a8f6f62bfcbe3aa17e2298b1cf4dbe771328
pdf-font-stream PDF embedded font (sfnt) at offset 0xAB6F 10288 bytes