Malicious PDF — malware analysis report

Static analysis result for SHA-256 81417ed16a638f0f…

MALICIOUS

PDF

48.6 KB Created: 2020-08-12 15:00:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6170cce7698d5c219ef55f71421861e2 SHA-1: fbc8180de19596934d2e56922256c662c0328c0b SHA-256: 81417ed16a638f0fdbbc18735e99d83108e8231d9d5ca8fca06115fb9e7ec848
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is likely used to obscure the final malicious destination. The document body itself contains garbled text but includes the URL that triggered the malicious redirector heuristic. The presence of a link farm and a malicious redirector indicates a phishing or malware distribution 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.ru/pify?keyword=lonely+shepherd+flute+and+piano+pdf
    • http://mofara.j2theson.com/uploads/1/3/0/7/130775732/lanukerebikami.pdf
    • http://nusuwaxid.cowboycollars.com/uploads/1/3/1/8/131856190/122258d.pdf
    • http://muziva.inscience242.com/uploads/1/3/1/3/131398591/9535620.pdf
    • https://cdn.shopify.com/s/files/1/0440/1030/7749/files/tesip.pdf
    • https://cdn.shopify.com/s/files/1/0432/7761/5262/files/digging_the_africanist_presence_in_american_performance.pdf
    • https://cdn.shopify.com/s/files/1/0437/0569/6407/files/50391368702.pdf
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/abba_dancing_queen_lyrics.pdf
    • https://cdn.shopify.com/s/files/1/0428/8741/3923/files/33553852206.pdf
    • https://cdn.shopify.com/s/files/1/0439/9883/8942/files/27054514587.pdf
    • https://cdn.shopify.com/s/files/1/0447/9310/2493/files/2d_seismic_survey_design.pdf
    • https://cdn.shopify.com/s/files/1/0434/0593/4757/files/wexijumujod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/duzawubemamomavokam.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004798.bin
b1a45f823751a2bc88e0c74d52aab7234278f0fe3561d8631987fb3134ecc288		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4798 5056 bytes
font_01_sfnt_off000058b8.bin
f687059d9f97323c488f2d34404eaff146065cac07c53f42cb9658c285ad1519		 pdf-font-stream PDF embedded font (sfnt) at offset 0x58B8 4764 bytes
font_02_sfnt_off00006a26.bin
2cad3a3031c95b3c9ca142d4d66f3c8f001861e02dd7e35332f4f1fe1829ea18		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A26 10752 bytes
font_03_sfnt_off00008f2e.bin
d8c82769ad1a82fc58dc03697d83e6786824c0492554dbc048bb50e8e1d59ba3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8F2E 16808 bytes
font_04_sfnt_off0000a68c.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA68C 4324 bytes

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