Malicious PDF — malware analysis report

Static analysis result for SHA-256 01f53afe5abe7bf6…

MALICIOUS

PDF

37.9 KB Created: 2020-09-10 04:51:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a6225cd4cb19693b98c3489bb558ffd7 SHA-1: 8493b0cab113a4271e848350ac627ed8c22e7054 SHA-256: 01f53afe5abe7bf61cf5a690199f686338a5468382358c9ea42d63e7b1103213
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, ttraff.me. The document body, though heavily obfuscated, also contains this URL. The presence of numerous external links, many pointing to benign Shopify URLs, suggests a link farm or SEO poisoning attempt, with the primary malicious link being the redirector. The ML classifier also strongly flagged this PDF as malicious.

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.me/pify?keyword=elf+bowling+1+game+free
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/f523c3_9f21c4360feb4a46a2b139ad64f629a4.pdf
    • https://static.usrfiles.com/ugd/cc03df_410b7c12ce034d9f8f0c5ad1b30a687b.pdf
    • https://static.usrfiles.com/ugd/1e533a_badc42df8191436f811da3b20961eebb.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c92dc5782b14e0b80868bdc27535de6.pdf
    • https://cdn.shopify.com/s/files/1/0433/7152/8344/files/11674343710.pdf
    • https://cdn.shopify.com/s/files/1/0450/9810/7045/files/create_github_repo_from_command_line.pdf
    • https://cdn.shopify.com/s/files/1/0430/1458/6517/files/keyence_il-_100_datasheet.pdf
    • https://static.usrfiles.com/ugd/e3ff21_f7827d71e5a34be0b8717b0139965c6b.pdf
    • https://static.usrfiles.com/ugd/64d889_ce4951cdc70d40afb418aa0993dbc1c1.pdf
    • https://static.usrfiles.com/ugd/4c4e45_028f47be24674b98b5430a35ca6679e2.pdf
    • https://static.usrfiles.com/ugd/e2f7e1_88d42be4959448e5a9da7709760355f9.pdf
    • https://static.usrfiles.com/ugd/ce77c6_704365da5cc94db69dd5710dc6fc98a4.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_off000054d4.bin
89dacdf82254829064312a33dd5bd1afa4cdb589bab1dd7be7b8d4ccd952f1d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x54D4 5148 bytes
font_01_sfnt_off00006668.bin
92bd0bb394868e8d6c6d385731b7675af76e842075ad1a322c87e85f80f0bc11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6668 10436 bytes