Malicious PDF — malware analysis report

Static analysis result for SHA-256 79b095f85f4e5a78…

MALICIOUS

PDF

39.0 KB Created: 2020-07-28 16:42:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 88bb4736f0b698c38d8fd9bc66885d71 SHA-1: 776c271278d1f92f8d8fed371ffd56a324e7b34f SHA-256: 79b095f85f4e5a78aba88ee82e4784b70ea9b6ed11e5ab76cf69fdc5e81161a5
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in Systems T1059.001 PowerShell

The PDF file contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, including one hosted on 'cdn.shopify.com'. The document body, though heavily obfuscated, appears to be a lure related to a 'pdf encyclopedia of world history'. 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.ru/pify?keyword=pdf+encyclopedia+of+world+history
    • http://files.suitedreams.com/uploads/1/3/0/9/130969761/885419ab6ae9a.pdf
    • http://files.lms-art.co.uk/uploads/1/3/1/3/131381464/rimidonoka-babotenanukojas-disuz-xapogozolivariv.pdf
    • http://files.jdbscholarship.com/uploads/1/3/2/7/132740584/4429280.pdf
    • http://files.dragonchoirs.net/uploads/1/3/1/3/131380504/nebemebiber-gorik-fiwumoxunubowe.pdf
    • http://files.jdbscholarship.com/uploads/1/3
    • https://cdn.shopify.com/s/files/1/0440/6483/3686/files/diwokumuxabubo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5088/4505/files/bijojikidelenufafa.pdf
    • https://cdn.shopify.com/s/files/1/0432/3550/8381/files/1190527939.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dotalufakelani.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/31052941417.pdf
    • https://cdn.shopify.com/s/files/1/0428/0942/6079/files/wudafetaluzoweta.pdf
    • https://cdn.shopify.com/s/files/1/0431/2514/5760/files/faletamu.pdf
    • https://cdn.shopify.com/s/files/1/0430/2045/1997/files/88858349688.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/vomomajulozu.pdf
    • https://cdn.shopify.com/s/files/1/0438/1681/2706/files/bedebamejejotaf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1274/3580/files/99282506561.pdf
    • https://cdn.shopify.com/s/files/1/0437/3096/0549/files/23276110104.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_off00005b12.bin
8a37fc370e5eb20911ffab641ef1f128b2648019a6866a7547da438660d4ba12		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5B12 5224 bytes
font_01_sfnt_off00006cd9.bin
6246d769d030d59e327fc5cc019091e8d235442ae0a1eb9298330c3a45f7e0e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6CD9 9968 bytes

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