Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ec7597a5c96dc83…

MALICIOUS

PDF

48.0 KB Created: 2020-09-06 03:57:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2dd01cd4877f02c5010c95a247ad900 SHA-1: 9b7c11d5911b2b00a982f1fe2f622963fb8589e4 SHA-256: 6ec7597a5c96dc832ee023c3b1dec537334297cae6c26899adee9f74c0f6592f
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised as a design PDF. The ML classifier strongly indicates maliciousness, and the presence of numerous external links suggests a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the PDF structure and embedded links are indicative of a phishing or redirection attack.

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.link/pify?keyword=biw+design+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/3600/0931/files/zufigijedijukeraketa.pdf
    • https://cdn.shopify.com/s/files/1/0437/3561/3594/files/mortgage_fee_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0430/3283/8298/files/girasukosunovejebadubi.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/tesol_quarterly_journal_articles.pdf
    • https://static.usrfiles.com/ugd/22739b_4fdd868e935442ae8504179460a4c721.pdf
    • https://cdn.shopify.com/s/files/1/0429/6497/5765/files/kurap.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/niwaragevutaxesidep.pdf
    • https://cdn.shopify.com/s/files/1/0430/6989/8903/files/cb_editing_background_png.pdf
    • https://cdn.shopify.com/s/files/1/0431/8350/5562/files/fajonasodonevaseragit.pdf
    • https://cdn.shopify.com/s/files/1/0436/5195/6894/files/xawiloruzimebawaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/3073/1173/files/16702153349.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_off00007d88.bin
1edcaff7d0115a7181199e6a685fa3aea2f97987fd77f592eba95782bec6aa2e
pdf-font-stream PDF embedded font (sfnt) at offset 0x7D88 5012 bytes
font_01_sfnt_off00008ecc.bin
f6b5bda4be2c65545a3f697bf2f47dfc0dbd07bc1476a0f822da582b62c3f4e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8ECC 10932 bytes