Malicious PDF — malware analysis report

Static analysis result for SHA-256 a95a38f4b4a69742…

MALICIOUS

PDF

37.7 KB Created: 2020-08-19 06:57:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b222ce283ad0af246ade632663221707 SHA-1: f14bfff4fd8656f2a75a0af80901c2156e975e8b SHA-256: a95a38f4b4a69742740678407ad2877b1f74d5f5e822e836a3d3fd2f84ac0ae6
150 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, a common tactic for SEO manipulation and distributing malicious content. One of the primary links directs to a known malicious redirector, ttraff.cc, which is disguised as a wallpaper download. This suggests the document's purpose is to redirect users to malicious infrastructure. The PDF structure and the presence of a link farm indicate a social engineering attack aimed at driving traffic to potentially harmful sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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=sky+blue+color+wallpaper+hd
    • http://files.imancircusarts.com/uploads/1/3/0/9/130970003/tikuzuzupuwotad.pdf
    • http://torozago.greatscottideas.com/uploads/1/3/0/7/130739704/6010c6f3d3ae5.pdf
    • https://cdn.shopify.com/s/files/1/0437/5746/9845/files/66638398223.pdf
    • https://cdn.shopify.com/s/files/1/0434/2287/5800/files/1451350852.pdf
    • https://cdn.shopify.com/s/files/1/0431/3884/2779/files/zoneratikuguwuwijuxenid.pdf
    • https://cdn.shopify.com/s/files/1/0433/5838/8374/files/28118790379.pdf
    • https://cdn.shopify.com/s/files/1/0432/7194/6398/files/28624673256.pdf
    • https://cdn.shopify.com/s/files/1/0440/4133/9045/files/antimicrobial_resistance_articles.pdf
    • https://cdn.shopify.com/s/files/1/0438/1927/0301/files/switchresx_el_capitan.pdf
    • https://cdn.shopify.com/s/files/1/0428/8158/1209/files/kapajul.pdf
    • https://cdn.shopify.com/s/files/1/0429/2732/5343/files/24235960898.pdf
    • https://cdn.shopify.com/s/files/1/0430/1553/6793/files/begrime_font_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1986/files/nivafewavod.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_off000054d2.bin
02f47e7f9aa9c825952ced3027340ec0f8e5990f41e49add19ae09240624ab8d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54D2 5484 bytes
font_01_sfnt_off0000677e.bin
e8b6371ecb87e463e4fdfc85941c8321531e77e8258ff26a002666b38f013e48		 pdf-font-stream PDF embedded font (sfnt) at offset 0x677E 10288 bytes

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