Malicious PDF — malware analysis report

Static analysis result for SHA-256 95e8e8238fb6e9ed…

MALICIOUS

PDF

39.7 KB Created: 2020-08-09 01:35:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 843036f648337f59a889c6d44e2cc844 SHA-1: de350a36a1e927057efc380318412205020db7a0 SHA-256: 95e8e8238fb6e9ed05fc6f7c86e73338d4e0cb926d50f541ef9a70938e0cc405
120 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, many of which point to a redirector service. The document body, though heavily obfuscated, contains references to a "letter of appointment" and includes the malicious URL. This suggests the document is designed to trick the user into clicking the malicious link, likely leading to further malware download or a phishing attempt.

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=letter+of+appointment+pdf
    • http://files.bedfellowsmagazine.com/uploads/1/3/1/0/131069934/9000152.pdf
    • http://vijizi.observationsandconclusions.com/uploads/1/3/1/1/131163599/eb7671344c78.pdf
    • http://files.stjohnsdelhi.org/uploads/1/3/0/7/130776599/wejuguxekajugin.pdf
    • https://cdn.shopify.com/s/files/1/0431/5525/9560/files/rearrange_pages_foxit.pdf
    • https://cdn.shopify.com/s/files/1/0437/6032/0663/files/81939582606.pdf
    • https://cdn.shopify.com/s/files/1/0431/7931/1253/files/rurunikodewizewitomuwe.pdf
    • https://cdn.shopify.com/s/files/1/0433/9384/3358/files/botukugegonusasezuvi.pdf
    • https://cdn.shopify.com/s/files/1/0431/1734/6965/files/91830118049.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/31995481059.pdf
    • https://cdn.shopify.com/s/files/1/0441/1562/4088/files/oxford_dictionary_of_english_etymology.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/17368616260.pdf
    • https://cdn.shopify.com/s/files/1/0433/2358/8773/files/befefe.pdf
    • https://cdn.shopify.com/s/files/1/0432/4517/4939/files/41417238259.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_off00005990.bin
58802f451344352624763b0bcdbd86525c5f0531a2f0e3d148b85c0907be1bb0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5990 4920 bytes
font_01_sfnt_off00006a3c.bin
e1b8d149c5c1d7d4170dbd5dd61e65648d9c30c8ec6ad6d4544a397b61afabce		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A3C 11940 bytes

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