Malicious PDF — malware analysis report

Static analysis result for SHA-256 71b8f67b55e14671…

MALICIOUS

PDF

40.1 KB Created: 2020-08-31 04:43:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a0edef81f04af390d84459674399ee40 SHA-1: 88c960d6f7b34e118538e4515107d1b669cb0bce SHA-256: 71b8f67b55e146717a09ae53ffb2615ef1f94233f12901030cf587384debbe54
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded links that point to a known malicious redirector infrastructure, specifically 'ttraff.com'. This suggests the document is designed to redirect users to malicious sites, likely for phishing or scam purposes. The presence of numerous other PDF links, some of which are benign, indicates a potential link farm or SEO manipulation tactic to obscure the malicious intent. No scripts were extracted, but the PDF structure and malicious links are strong indicators of a phishing or scam lure.

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.com/wix?keyword=contrast+ratio+explained
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_24aea0c63e874923a51c64b47926ef78.pdf
    • https://static.usrfiles.com/ugd/e33828_54b44e11776d4726a6dd5e556ffc01f6.pdf
    • https://static.usrfiles.com/ugd/fa6f14_31cecd51d59e49f7901286626d890f48.pdf
    • https://static.usrfiles.com/ugd/b58d21_bb94f464b7c14ed0ad551c78e7e80882.pdf
    • https://static.usrfiles.com/ugd/70a38d_fc24119418524ad2bddf4e44134bbf36.pdf
    • https://static.usrfiles.com/ugd/eda9ba_16a7f1a8f26d43d08ff4c0a516dc7776.pdf
    • https://static.usrfiles.com/ugd/d3758e_3480df07627245f7a463d1dde447b49d.pdf
    • https://static.usrfiles.com/ugd/6a22cb_c43e5f9866374f05844bdf0130de756e.pdf
    • https://static.usrfiles.com/ugd/64d889_f12e5cc29734475685cc0ad945ffd64f.pdf
    • https://static.usrfiles.com/ugd/2f8cea_c5753b0b12e444e8916ea3cce14e26ae.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad01e4458ed1442e9f2792d5686f9ff2.pdf
    • https://static.usrfiles.com/ugd/b8c837_eb337cc5f30340fc93be43de54c95934.pdf
    • https://static.usrfiles.com/ugd/b8c837_d22b7b1c7ebd4c4f93e4430c7519d839.pdf
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/roloxedolaraborozumelegov.pdf
    • https://cdn.shopify.com/s/files/1/0434/8539/7152/files/sutojezaxomizusuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/6196/8025/files/magical_psi_tutorial.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_off0000609b.bin
c87ef49c4df86e7fc559db4d5d8c651485f203e1b0eea2e64dc2d8ea350ba27c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x609B 4928 bytes
font_01_sfnt_off00007161.bin
391bd1819f625c1fac48e79519f223679bf4a8d98265541392bc01f3b65c785c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7161 10088 bytes

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