Malicious PDF — malware analysis report

Static analysis result for SHA-256 06df62f5008620cd…

MALICIOUS

PDF

33.0 KB Created: 2020-09-02 17:14:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ca7e488edacbc9480dd596fb9dcaa9c9 SHA-1: 70afb01cb50764aed35d78323020b822b79c5c1c SHA-256: 06df62f5008620cd5e4d0c0a3f313ae267db22a9629d1085de3f5da2cfb03013
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous links, including a primary link to 'ttraff.com', identified as a malicious redirector. The document body, though heavily obfuscated, contains text suggesting it is masquerading as search results for educational content, likely to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness, and the presence of a link farm further supports a malicious intent.

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=oxford+bookworms+stage+1+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ad2ade_0c49c435e1bb4924aacfe33f63f4091f.pdf
    • https://static.usrfiles.com/ugd/b8c837_98c42a7bebad40b3bb10e7c6e3deba65.pdf
    • https://static.usrfiles.com/ugd/6d59ab_49f6ca273c074174b4828acd6fc887d6.pdf
    • https://static.usrfiles.com/ugd/1df9ea_9f19ef001eaf48ba8d19295da91c93e3.pdf
    • https://static.usrfiles.com/ugd/a467d2_98bd36586e474ba29f9051a147c67abb.pdf
    • https://static.usrfiles.com/ugd/bcd086_f009d3929c1b42ea8185344907e47840.pdf
    • https://static.usrfiles.com/ugd/0adedf_fad437222fbc4b77b8b77a5532af7205.pdf
    • https://static.usrfiles.com/ugd/d78803_727796c7dcb04783a9fe479b86a9bb0c.pdf
    • https://static.usrfiles.com/ugd/b8c837_07194948e0f94b1e95d745f6ae29c3ba.pdf
    • https://static.usrfiles.com/ugd/b8c837_dfa500f60d3449a1bfd641fce0364fba.pdf
    • https://cdn.shopify.com/s/files/1/0462/8322/7296/files/tegozi.pdf
    • https://cdn.shopify.com/s/files/1/0430/9545/7941/files/guided_access_apple_configurator.pdf
    • https://cdn.shopify.com/s/files/1/0432/7807/4020/files/54966751191.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_off00004214.bin
963e4751844760d5311ea7d36c555ba9cf5d66d753fe70db5cf790bec6aa4a95
pdf-font-stream PDF embedded font (sfnt) at offset 0x4214 5772 bytes
font_01_sfnt_off000055c5.bin
942b753cfbc2fdfd7a8603f602e681d756f0553b7da615832f87a1c949ee483d
pdf-font-stream PDF embedded font (sfnt) at offset 0x55C5 9888 bytes