Malicious PDF — malware analysis report

Static analysis result for SHA-256 81fef00c5e88e162…

MALICIOUS

PDF

39.5 KB Created: 2020-08-03 07:57:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b1b03090af64b6dcb4ddaa0714c08976 SHA-1: f5e4b409535a66be471d728176cadc349152263a SHA-256: 81fef00c5e88e162d421b1f203aad0413bc750880a266f29ac7331b75b72d7ca
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One critical heuristic firing indicates that the PDF links to known malicious redirector infrastructure, specifically 'https://ttraff.cc/pify?keyword=informatica+administrator+tutorial+pdf'. This suggests the document is designed to redirect users to potentially harmful sites, likely for phishing or malware distribution.

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=informatica+administrator+tutorial+pdf
    • http://files.riddlefamilyranchgrassfedbeef.com/uploads/1/3/0/9/130969862/3254768.pdf
    • http://files.lydiaw.com/uploads/1/3/1/3/131379324/kosanazel_memomufojutoxep_sedoninu_tuketisenol.pdf
    • http://files.speakathometonight.com/uploads/1/3/2/7/132712315/8286132.pdf
    • https://cdn.shopify.com/s/files/1/0435/4693/5451/files/xamadabetutefegujosowa.pdf
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/fuvosinawaxod.pdf
    • https://cdn.shopify.com/s/files/1/0434/6275/4461/files/suvinamivazudalabomaxurew.pdf
    • https://cdn.shopify.com/s/files/1/0432/2033/6802/files/gokewerivefim.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/71340125447.pdf
    • https://cdn.shopify.com/s/files/1/0430/8090/8949/files/50565971198.pdf
    • https://cdn.shopify.com/s/files/1/0433/6458/1525/files/bakemijiwoduniv.pdf
    • https://cdn.shopify.com/s/files/1/0433/6159/9643/files/vitedizugurekijunopipogul.pdf
    • https://cdn.shopify.com/s/files/1/0427/8606/2495/files/ww_alc_co_jp.pdf
    • https://cdn.shopify.com/s/files/1/0441/0982/4152/files/dasuragawedorumijiduwavex.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rejukimuvili.pdf
    • https://cdn.shopify.com/s/files/1/0438/9024/5787/files/65363855008.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_off00005e56.bin
4dd0dd3d66ed9909f3f1626099091caab89b22b1bec903fed5e63d017dddabf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E56 5236 bytes
font_01_sfnt_off0000700b.bin
36973beee9285dbdc6a648b101066639cf6139c3a3f5f5cc8800d6d8d725562c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x700B 9672 bytes

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