Malicious PDF — malware analysis report

Static analysis result for SHA-256 3193fd39b7d17ca3…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 07:41:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 178ab1f7e6ce77cef125a6fcca3bed8d SHA-1: cd98c72d3c71ff7695189477d0854db79083b1a0 SHA-256: 3193fd39b7d17ca3ec60f9c42a8eaebd7b539f5c197cce6a678cef439998d2d5
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains multiple embedded links. One of these links, https://ttraff.com/pify?keyword=beautiful+nature+images+hd, points to a known malicious redirector. The document also exhibits characteristics of a PDF link farm, with numerous links to other PDFs hosted on Shopify. The primary attack pattern appears to be luring users to malicious infrastructure through a deceptive document.

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=beautiful+nature+images+hd
    • http://buxago.bodymoksha.com/uploads/1/3/1/6/131606457/buzuluxikomemid.pdf
    • https://cdn.shopify.com/s/files/1/0439/5122/7038/files/jetufik.pdf
    • https://cdn.shopify.com/s/files/1/0431/6754/7546/files/85354210274.pdf
    • https://cdn.shopify.com/s/files/1/0432/2761/1300/files/et_misericordia_magnificat_bach.pdf
    • https://cdn.shopify.com/s/files/1/0435/0532/0088/files/junidofa.pdf
    • https://cdn.shopify.com/s/files/1/0434/8418/4728/files/dhfl_housing_finance_annual_report.pdf
    • https://cdn.shopify.com/s/files/1/0430/7487/9641/files/63867747091.pdf
    • https://cdn.shopify.com/s/files/1/0437/5976/3617/files/ishihara_colour_blindness_test_24_plate.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pujipipokumamidepuw.pdf
    • https://cdn.shopify.com/s/files/1/0433/9816/8727/files/80167529492.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_off000062c2.bin
26a3bc379f59fbe8e40e1d1e42b0655df350f5e0598854f7e33dffdb68bdae3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x62C2 5368 bytes
font_01_sfnt_off000074d7.bin
ffd357f0fd61589b4b3ba55360592e1b084011f5ea616ff2fb2760bf768f5461		 pdf-font-stream PDF embedded font (sfnt) at offset 0x74D7 10872 bytes

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