Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac90892a780bd93…

MALICIOUS

PDF

43.8 KB Created: 2020-08-19 08:54:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 662fb32a2c72076a1034587ac11281a8 SHA-1: f6dc999d4156dbcb726e51fc643a0d55d7601822 SHA-256: 1ac90892a780bd93f5b9e2ee5f5f3afa367111ed86a69d1d820c2cf9fa5e7727
120 Risk Score

Malware Insights

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

The PDF document contains a link that redirects to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body text, though corrupted, appears to be a lure related to tax returns, and the PDF_SEO_LINK_FARM heuristic suggests a large number of similar links are present. The primary malicious IOC is the redirector URL.

Heuristics 3

  • 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.
  • 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=company+income+tax+return+form+2017
    • http://files.moservp.com/uploads/1/3/1/6/131606343/234021.pdf
    • http://xijesagox.creativecitychallenge.com/uploads/1/3/2/8/132814930/8569447.pdf
    • https://cdn.shopify.com/s/files/1/0429/2391/7475/files/10253234338.pdf
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/49231834588.pdf
    • https://cdn.shopify.com/s/files/1/0435/6934/8763/files/xarevakufawimune.pdf
    • https://cdn.shopify.com/s/files/1/0430/7543/6698/files/housing_contract_purdue.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zafon.pdf
    • https://cdn.shopify.com/s/files/1/0431/8894/5064/files/65423448892.pdf
    • https://cdn.shopify.com/s/files/1/0433/5815/9006/files/jotaso.pdf
    • https://cdn.shopify.com/s/files/1/0429/0120/9251/files/gelabekaxeradadodex.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_off00006c0a.bin
35bf4fd6b6a255bfa4b2fd6912afe0b8a4712173e34d4648751d032913d8307f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C0A 5432 bytes
font_01_sfnt_off00007e85.bin
c6174507d8d2b78b7944f437d5a8b56ba0dcb2adc8be1f72a249113368889fd9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E85 10596 bytes

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