Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb9439a616bded43…

MALICIOUS

PDF

36.9 KB Created: 2020-08-22 03:08:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5845430a01d11a1c39240494b75b13f3 SHA-1: 269262dab877e7fd605db103091cdfe0e142cb3c SHA-256: fb9439a616bded4381d15b3d9ede38051fdbb764fb0fffb6f0b22624ece54912
120 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, specifically `https://ttraff.cc/pify?keyword=excel+footer+sheet+number`. This indicates the document is designed to lure users to malicious infrastructure. The presence of a PDF link farm further supports a social engineering attack vector. No scripts were extracted from this sample.

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.cc/pify?keyword=excel+footer+sheet+number
    • http://files.abigailcrscott.com/uploads/1/3/0/7/130740573/zapafegix.pdf
    • https://cdn.shopify.com/s/files/1/0434/5557/8273/files/60940903899.pdf
    • https://cdn.shopify.com/s/files/1/0432/7686/1606/files/enseanza_sobre_el_bautismo_en_agua.pdf
    • https://cdn.shopify.com/s/files/1/0428/4216/1319/files/kisaliteb.pdf
    • https://cdn.shopify.com/s/files/1/0435/2465/3224/files/20948918804.pdf
    • https://cdn.shopify.com/s/files/1/0430/4479/8613/files/papigimiganerijidizuvo.pdf
    • https://cdn.shopify.com/s/files/1/0427/7128/4135/files/roxaxulutipafuroranetumat.pdf
    • https://cdn.shopify.com/s/files/1/0429/8234/2815/files/nonujogudafo.pdf
    • https://cdn.shopify.com/s/files/1/0434/6337/7048/files/gijelorosevobixilodusot.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_off000052de.bin
1714a00e4317806d2faded5bec36e4babe8346cc0c2a19a024a1214386efb6b7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x52DE 5076 bytes
font_01_sfnt_off000063f9.bin
e9c7fb3cb54b2b8d99a6c30de76e8e22cf09f3f07eb817ea8fbb371b8ae9bb55		 pdf-font-stream PDF embedded font (sfnt) at offset 0x63F9 10436 bytes

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