Malicious PDF — malware analysis report

Static analysis result for SHA-256 08a211f41cb32c48…

MALICIOUS

PDF

52.5 KB Created: 2020-08-07 01:20:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4e06947450f143deffbc1db00ccb728c SHA-1: 3c912047b470019536297f10f3f4160437e60819 SHA-256: 08a211f41cb32c482c0bc3891c23f64a48103b8c15618fa40ffb05334cc86497
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains numerous links, with the primary one leading to a known malicious redirector. The document body, though partially corrupted, includes the same URL, suggesting a lure to a malicious site. The presence of many external PDF links indicates a link farm, likely for SEO manipulation or to host further malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=understanding+and+using+english+grammar+book+pdf
    • http://files.gloucestershiregatewaytrust.org.uk/uploads/1/3/1/3/131398125/dubesamamivudi.pdf
    • http://files.tagst.net/uploads/1/3/1/3/131380604/12f3ca0c47fc0d4.pdf
    • http://files.saskstealth.net/uploads/1/3/0/7/130740320/karelenawe_jegedem_kexusurabirupe.pdf
    • http://rajojokuw.jacktaylorphillips.com/uploads/1/3/1/6/131637316/pajilobusuduk.pdf
    • http://files.mikejdonovan.com/uploads/1/3/1/3/131379296/tukifotozijudawip.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/6993/1673/files/58569299532.pdf
    • https://cdn.shopify.com/s/files/1/0427/8992/9116/files/88764562800.pdf
    • https://cdn.shopify.com/s/files/1/0431/6663/0050/files/40365378338.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/13170590630.pdf
    • https://cdn.shopify.com/s/files/1/0431/1770/7425/files/wuniwuzurugubelono.pdf
    • https://cdn.shopify.com/s/files/1/0432/5657/8212/files/39913789796.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53295895336.pdf
    • https://cdn.shopify.com/s/files/1/0430/3486/9921/files/raloxejimikaboz.pdf
    • https://cdn.shopify.com/s/files/1/0427/5470/3526/files/darkest_hour_cheats.pdf
    • https://cdn.shopify.com/s/files/1/0433/1631/4277/files/96145260952.pdf
    • https://cdn.shopify.com/s/files/1/0440/9671/6952/files/97319456365.pdf
    • https://cdn.shopify.com/s/files/1/0432/4163/5997/files/zuduwumisaduxazixuzav.pdf
    • https://cdn.shopify.com/s/files/1/0440/1712/3486/files/best_ebook_reader_ipad.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006d9d.bin
5cf0e7456e54f892fb90220db2828b64f4fbf12253e7e71827d4e359860ea84a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6D9D 5652 bytes
font_01_sfnt_off0000809d.bin
5b39e9209f2f5823ace8c91dcdd9d22e48f67d4c3a8bd5da9fa9055417ac3ba4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x809D 2576 bytes
font_02_sfnt_off00008a5b.bin
e20b9f73747d6fe8a99214307164a348f37e1efd9203b6e1b64deafe19fc7718		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8A5B 9988 bytes
font_03_sfnt_off0000ac7e.bin
735e795b4d16529a49140ac7f40a22111760e3f1c48d6bea317f9a0d5f86c05c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAC7E 16780 bytes

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