Malicious PDF — malware analysis report

Static analysis result for SHA-256 7b8b70e1f22cb606…

MALICIOUS

PDF

44.2 KB Created: 2020-08-31 21:09:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4449d865c9420f0f73a97868591fea3e SHA-1: 74d303a4edd181659d34d62887ca43a90c9d93a1 SHA-256: 7b8b70e1f22cb606236d2c040072588481e336e3f29bc2f368243e00d5f24876
140 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to 'Upsc cds form online' and a URL that appears to be part of a link farm. The presence of a malicious redirector and numerous links suggests an attempt to drive traffic to potentially malicious sites, possibly for phishing or further malware delivery.

Heuristics 4

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns
  • 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=upsc+cds+form+online
    • https://static.usrfiles.com/ugd/cc089a_b1c337191a954ac6933ceac19649b3b8.pdf
    • https://static.usrfiles.com/ugd/e42ee3_8648adef3e4e4f77a308d73c2bdf6d48.pdf
    • https://static.usrfiles.com/ugd/c8d394_3a4b144d64ec41c1b9b97972fd45bade.pdf
    • https://static.usrfiles.com/ugd/19103d_051b66d1d7414ec59705376b9ded08ca.pdf
    • https://static.usrfiles.com/ugd/c836c3_4c37eefe1edd43928505d55cb79c172c.pdf
    • https://static.usrfiles.com/ugd/b8c837_acdbb6ff422f4e5e854f4982dd587dd7.pdf
    • https://cdn.shopify.com/s/files/1/0440/8783/6837/files/43512580130.pdf
    • https://cdn.shopify.com/s/files/1/0429/6635/2025/files/xidatufexo.pdf
    • https://cdn.shopify.com/s/files/1/0440/4068/3685/files/bubble_bobble_game_online_free.pdf
    • https://cdn.shopify.com/s/files/1/0438/0812/9185/files/moero_downhill_night_blaze.pdf
    • https://cdn.shopify.com/s/files/1/0431/7364/2389/files/bakteri_agrobacterium_tumefaciens.pdf
    • https://cdn.shopify.com/s/files/1/0436/2852/7776/files/54381663495.pdf
    • https://cdn.shopify.com/s/files/1/0440/6103/2598/files/vivorovowajozovom.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_off000067f7.bin
17d5d54e99e8eb6a74af8f099e0aa26e359df67200ad06be44251196a11d1bfa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x67F7 5084 bytes
font_01_sfnt_off00007935.bin
92971e5fff5ccb40a871d1851e25951a7751fcee398b38972d5c2a86a1d876f7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7935 13956 bytes

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