Malicious PDF — malware analysis report

Static analysis result for SHA-256 d1cd2719b3b104af…

MALICIOUS

PDF

40.0 KB Created: 2020-09-09 02:52:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 933e950f8c3567a30f37ca49dca9f07e SHA-1: a97a5877cf1f18172ff5048c5b539d1cf7354130 SHA-256: d1cd2719b3b104af31c71ebb07129709ce837a1ff8468dc81f2697ca412e2007
128 Risk Score

Malware Insights

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

The PDF contains a link to a redirector, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The SE_INVOICE_LURE heuristic indicates the document's content is a fake invoice or payment lure, designed to trick the user into clicking the malicious link. The PDF_SEO_LINK_FARM heuristic shows a large number of external links, many pointing to Shopify domains, suggesting a broad distribution effort. The primary malicious IOC is the redirector URL.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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.link/wix?keyword=custom+checkout+form+stripe
    • https://static.usrfiles.com/ugd/f8de3e_f2779ad882454b4d98c1f9d5fc6e2f24.pdf
    • https://static.usrfiles.com/ugd/e1d12c_664ac7c3d60c401b954b0695a8d27e08.pdf
    • https://static.usrfiles.com/ugd/031dda_7f327038006e4f6c926840192335af49.pdf
    • https://static.usrfiles.com/ugd/221f3a_9f2684997d2d4285b884cf4fd8175fa0.pdf
    • https://cdn.shopify.com/s/files/1/0427/4946/0636/files/list_of_extreme_adjectives.pdf
    • https://cdn.shopify.com/s/files/1/0429/3053/6614/files/bobagaropozalarujevaw.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9330/files/base_plate_design_nptel.pdf
    • https://cdn.shopify.com/s/files/1/0430/6593/3985/files/patufab.pdf
    • https://cdn.shopify.com/s/files/1/0437/2296/5160/files/54419835528.pdf
    • https://cdn.shopify.com/s/files/1/0430/2117/2897/files/autumn_leaves_jazz_piano_trio.pdf
    • https://cdn.shopify.com/s/files/1/0430/6888/3106/files/54497035920.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_off0000605e.bin
d1262c64d608d91e0f11c5698fc00d0c3437e2cb38b1bada0061f3701d022b09		 pdf-font-stream PDF embedded font (sfnt) at offset 0x605E 4980 bytes
font_01_sfnt_off0000712b.bin
26f868e81876083953b0e62f4ef7562ae4d42c2d27a7a5a24cb54a79a3074950		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712B 10032 bytes

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