Malicious PDF — malware analysis report

Static analysis result for SHA-256 5685e2e327e99448…

MALICIOUS

PDF

42.3 KB Created: 2020-08-22 20:48:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ea113c729e88c2a90e5e6b9ee9549453 SHA-1: 9592461c7053a14ee77d13736cfc30c2fbcf6de7 SHA-256: 5685e2e327e9944830b5bf9fef4b218fda96f25d829b221c117e791506eabccf
154 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, many pointing to shopify.com domains, but one critical link directs to a known malicious redirector at 'ttraff.ru'. This suggests the document is part of a link farm designed to lure users to malicious sites. The ML classifier strongly supports the malicious nature of this PDF.

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=evermore+alyson+noel
    • http://reroli.wetherillparkchurch.org/uploads/1/3/1/8/131871390/xuxosoku.pdf
    • http://feriwupi.temeculatowcompany.com/uploads/1/3/1/0/131071243/zejejo.pdf
    • http://majon.healthybeautyenergy.com/uploads/1/3/2/6/132681352/dunedegu_bobomegeziline.pdf
    • https://cdn.shopify.com/s/files/1/0439/3094/3643/files/gireb.pdf
    • https://cdn.shopify.com/s/files/1/0436/6788/2134/files/suzuki_df140_service_manual.pdf
    • https://cdn.shopify.com/s/files/1/0432/6939/0500/files/42461363763.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/57148414383.pdf
    • https://cdn.shopify.com/s/files/1/0465/1633/8838/files/29966851386.pdf
    • https://cdn.shopify.com/s/files/1/0432/8531/5737/files/92568655713.pdf
    • https://cdn.shopify.com/s/files/1/0453/8610/5000/files/denazixululejezu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8232/3870/files/87497120690.pdf
    • https://cdn.shopify.com/s/files/1/0428/7492/9319/files/24064636060.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_off0000651e.bin
c7e7481e076e052f995da611a082a4f5df457b19e8e3ebb323e3626158e02db9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x651E 4948 bytes
font_01_sfnt_off000075e5.bin
c77e97ce4c38a251bf205acf14a932c623bc825275310270737472f931e6d766		 pdf-font-stream PDF embedded font (sfnt) at offset 0x75E5 12840 bytes

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