Malicious PDF — malware analysis report

Static analysis result for SHA-256 c4f831003d4991ba…

MALICIOUS

PDF

32.7 KB Created: 2020-08-16 13:40:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7f383b04162d594f305b61854a3eacbc SHA-1: c9ab534c6a25dfea539df36df2b1cfad7ffff1b8 SHA-256: c4f831003d4991baa64334f3a5d629c3ac14d288a90888280a50f1f670b89958
120 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.ru/wb?keyword=ryobi%20rpp720%20electric%20pole%20pruner%20manual'. This link is presented within the document body, disguised as a product manual, to entice users to click. The file also contains a PDF link farm heuristic, indicating a large number of external links, many of which are hosted on Shopify but also include several other suspicious domains. 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/wb?keyword=ryobi%20rpp720%20electric%20pole%20pruner%20manual
    • http://files.villageofpound.com/uploads/1/3/1/3/131384127/6999905.pdf
    • http://lafajirik.chesterfieldkidsforcommunity.org/uploads/1/3/0/7/130738850/puxodabunorizi.pdf
    • http://wunezu.artbychantellemarie.com/uploads/1/3/2/8/132816036/jazida.pdf
    • https://cdn.shopify.com/s/files/1/0431/4906/6394/files/all_flip_flop_truth_table.pdf
    • https://cdn.shopify.com/s/files/1/0435/0961/2712/files/canon_ir_adv_c5250_drivers.pdf
    • https://cdn.shopify.com/s/files/1/0432/8597/1110/files/cerita_rakyat_malin_kundang.pdf
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/opposite_words_in_english_list.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4650/files/30123708986.pdf
    • https://cdn.shopify.com/s/files/1/0434/1104/6558/files/is_sql_object_oriented.pdf
    • https://cdn.shopify.com/s/files/1/0430/3234/6773/files/31871454370.pdf
    • https://cdn.shopify.com/s/files/1/0433/4590/3781/files/jirisujukim.pdf
    • https://cdn.shopify.com/s/files/1/0434/8379/1517/files/gowigelifir.pdf
    • https://cdn.shopify.com/s/files/1/0430/1763/3945/files/ragiko.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_off00004207.bin
536bf4b62d8206f8b9da11f028ffe4d0705f4c5a5554c56841802b86efd16d11		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4207 5504 bytes
font_01_sfnt_off000054a5.bin
1518bbb1dc0960317a548a70ebbd07c54f35f522987c3adff512f73ab68e23be		 pdf-font-stream PDF embedded font (sfnt) at offset 0x54A5 9756 bytes

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