Malicious PDF — malware analysis report

Static analysis result for SHA-256 35c86e8aa23c3502…

MALICIOUS

PDF

35.5 KB Created: 2020-08-30 19:38:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3bd1e26a07e539475aaf9e4f75d54b09 SHA-1: 48f51db4d2dfa28e5631fcd042d13d97a27608be SHA-256: 35c86e8aa23c3502863fb67bb790cfec6646cf4e648fbcc3fff40bab0823448f
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, pointing to 'https://ttraff.cc/wix?keyword=free+printable+snowman+candy+wrapper'. The document body, though heavily obfuscated, contains text related to 'free printable snowman candy wrapper', suggesting a lure. The file also exhibits characteristics of a PDF link farm, with numerous embedded URLs, many of which point to Shopify domains, likely used to obscure the malicious redirector.

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.cc/wix?keyword=free+printable+snowman+candy+wrapper
    • https://static.usrfiles.com/ugd/b8c837_1b76a8d3816d4fdfbe9dcf1633979a1f.pdf
    • https://static.usrfiles.com/ugd/b8c837_1455d9b0fea344d49ed7ad619d0056bd.pdf
    • https://static.usrfiles.com/ugd/b8c837_a49fb5a83d01440d879dfc837c48a278.pdf
    • https://static.usrfiles.com/ugd/b8c837_24aea0c63e874923a51c64b47926ef78.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0c235dfc35946d0a1b74cd1f9022525.pdf
    • https://static.usrfiles.com/ugd/cd79e3_4dfcbe3c5dd948618290f65443eafb97.pdf
    • https://cdn.shopify.com/s/files/1/0438/2585/6662/files/rg_ap_710.pdf
    • https://cdn.shopify.com/s/files/1/0433/1867/3566/files/logical_connectors_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/3321/4621/files/mi_air_purifier_2s_manual.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/58097506778.pdf
    • https://cdn.shopify.com/s/files/1/0436/9245/8152/files/sitemupawa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9635/9580/files/49367664436.pdf
    • https://cdn.shopify.com/s/files/1/0431/6227/1898/files/gegutumugugal.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_off00004c4b.bin
3d77b01a77acbe781136f8ffe915573137e17b067364497cc8d779cf6a5daff7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C4B 5508 bytes
font_01_sfnt_off00005ef2.bin
531256f9d0a64e6908bfe2125daeaca4d6e3f527eaa973fd3f915e2373780bf4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5EF2 10060 bytes

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