Malicious PDF — malware analysis report

Static analysis result for SHA-256 85b110f514f1accc…

MALICIOUS

PDF

38.6 KB Created: 2020-08-30 21:56:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8f0670f9e18473a8e56d299904b31723 SHA-1: a226d1729d8a3b19ec4085b1f294f7454123493d SHA-256: 85b110f514f1accc5e79b04606374a6fdea69c9bd82ca15d65a1eac6d31b8287
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The primary link, https://ttraff.cc/wix?keyword=best+buy+ipad+prices, is associated with known malicious infrastructure. The document body, though heavily obfuscated, contains references to 'best buy ipad prices', suggesting a lure to entice clicks on the malicious link. The presence of a large number of PDF links also indicates a link farm, likely for SEO manipulation or distributing 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.cc/wix?keyword=best+buy+ipad+prices
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/5650/3707/files/lelenetigikatemogi.pdf
    • https://cdn.shopify.com/s/files/1/0429/9046/9283/files/80593085550.pdf
    • https://cdn.shopify.com/s/files/1/0428/9013/3663/files/fisiko.pdf
    • https://cdn.shopify.com/s/files/1/0432/5117/1478/files/basel_3_pwc.pdf
    • https://cdn.shopify.com/s/files/1/0430/9821/0461/files/46339282646.pdf
    • https://static.usrfiles.com/ugd/6df952_3c05855525e44d2bb6b43f9283a127c8.pdf
    • https://static.usrfiles.com/ugd/b8c837_f9ecb95da166493db45109e36c10740a.pdf
    • https://static.usrfiles.com/ugd/9c43ec_781d7e82b4c0418db275fabc1dea2b48.pdf
    • https://static.usrfiles.com/ugd/b8c837_eebae45992ab439ba4e4491924dd2d86.pdf
    • https://static.usrfiles.com/ugd/0aab01_f6a2f43129914aef8c06d1bbc4819565.pdf
    • https://static.usrfiles.com/ugd/837d34_4ee15fcaae4c4d06b0d5a199b4a394dc.pdf
    • https://static.usrfiles.com/ugd/b8c837_4ffc9d3d53a34e5f976b66ec13e5721d.pdf
    • https://static.usrfiles.com/ugd/b8c837_452c173a275f48aab677c95e82945d25.pdf
    • https://static.usrfiles.com/ugd/f967ac_f1fda8bddb8b4609bfb0f7f3791b2b8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_6a9cd31d2d9843b48d244e41380b1e88.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000569f.bin
ea5bb86d77b926962664e188a76dfd5671ee356b63e804bf32bb2523be0064ff
pdf-font-stream PDF embedded font (sfnt) at offset 0x569F 5328 bytes
font_01_sfnt_off000068c1.bin
55e3de6d08105f9f2dc157d168cb340a366101a8732860f903085ed4b2e7d6c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x68C1 10948 bytes