Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa78adafe12ff833…

MALICIOUS

PDF

49.7 KB Created: 2020-08-27 19:33:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2fcdad692117be0b618cbf18a62e6d84 SHA-1: c5e5037b54d3a6cc761dd5d86603c65130af15cc SHA-256: aa78adafe12ff83327cfbc5bd8ecf121ce9663d00d77e432beddd5898a0c58cc
162 Risk Score

Malware Insights

MITRE ATT&CK
T1204.002 Malicious Link T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.ru, which is designed to lead users to malicious content. The document also contains a large number of embedded links, many pointing to Shopify domains, which is characteristic of SEO link farms used to distribute malware. The 'SE_CLICKFIX' heuristic indicates the document likely instructs the user to manually execute a command, bypassing macro restrictions. The embedded URL in the document body, 'https://ttraff.ru/pify?keyword=project+cerberus+apk+1.+4.+5', is the primary indicator of malicious intent.

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.
  • ClickFix social engineering attack high SE_CLICKFIX
    Document instructs the user to press Win+R or paste a command into a terminal — consistent with ClickFix attacks that bypass macro restrictions by tricking users into running malicious commands directly
  • 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=project+cerberus+apk+1.+4.+5
    • http://files.autisticpridereading.co.uk/uploads/1/3/2/6/132682919/8276601.pdf
    • http://pusuniw.mymealwormsfarm.com/uploads/1/3/2/6/132681352/ratetavame.pdf
    • https://cdn.shopify.com/s/files/1/0454/3050/5628/files/wikanobemolemuxoz.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98029452840.pdf
    • https://cdn.shopify.com/s/files/1/0440/4035/6005/files/37826667743.pdf
    • https://cdn.shopify.com/s/files/1/0433/4285/6344/files/xubaxedewojilofinebewi.pdf
    • https://cdn.shopify.com/s/files/1/0434/4135/6950/files/dutonew.pdf
    • https://cdn.shopify.com/s/files/1/0433/7133/1734/files/lakavosifamifoba.pdf
    • https://cdn.shopify.com/s/files/1/0430/8451/3440/files/44064320653.pdf
    • https://cdn.shopify.com/s/files/1/0433/8660/1626/files/expressed_breast_milk_intake_guidelines.pdf
    • https://cdn.shopify.com/s/files/1/0445/4429/5076/files/huskee_riding_lawn_mower_parts_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4865/files/57088015507.pdf
    • https://cdn.shopify.com/s/files/1/0439/8520/7454/files/7192977331.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000073f4.bin
2de70e54464471d280fb8073ba77b580361916f2ca52e0450f15d313ea56ecaf
pdf-font-stream PDF embedded font (sfnt) at offset 0x73F4 5200 bytes
font_01_sfnt_off000085d0.bin
4d82586fd2e8acde22deeb018c0aeb9c60023ec33786972c57d47395d24d0db2
pdf-font-stream PDF embedded font (sfnt) at offset 0x85D0 11276 bytes
font_02_sfnt_off0000ac03.bin
a542ec26cea93e049a2e27cd59b1347dd9bbdea13775fd7b822b3c2b3136116f
pdf-font-stream PDF embedded font (sfnt) at offset 0xAC03 4324 bytes