Malicious PDF — malware analysis report

Static analysis result for SHA-256 6747deb2c015a99e…

MALICIOUS

PDF

37.7 KB Created: 2020-08-30 13:58:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1f847f604efbd80016c93bd795c5c354 SHA-1: a578009ab94009f734c177e464de0b30a72d2365 SHA-256: 6747deb2c015a99e24dea5eb87bf56504ff88b256595fb5d294f06246ad46c23
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically identified as a malicious redirector pointing to 'https://ttraff.ru/wix?keyword=boa+constrictor+shel+silverstein+pdf'. The presence of numerous other PDF links, many hosted on Shopify, suggests a link farm or SEO poisoning attempt. While no scripts were explicitly extracted, the ML classifier and redirector heuristic strongly indicate malicious intent, likely to lure users to malicious sites or download further payloads.

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.ru/wix?keyword=boa+constrictor+shel+silverstein+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/3832/6432/files/fundamentals_of_cost_accounting_5th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0440/1430/5430/files/tabusewuwezaxoja.pdf
    • https://cdn.shopify.com/s/files/1/0427/9202/6271/files/63795145551.pdf
    • https://cdn.shopify.com/s/files/1/0438/2556/1757/files/grisham_camino_island.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/github_create_a_new_branch.pdf
    • https://cdn.shopify.com/s/files/1/0428/3963/8179/files/76528165765.pdf
    • https://cdn.shopify.com/s/files/1/0436/8865/7049/files/17127846464.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/36281161478.pdf
    • https://static.usrfiles.com/ugd/b8c837_2ae2582386cf4e27979301d401409196.pdf
    • https://static.usrfiles.com/ugd/c0fca2_d8a72467a558480bb86e12c37a89d36a.pdf
    • https://static.usrfiles.com/ugd/c1615c_b60aeb2f562b46cda22f466b02f6b78d.pdf
    • https://static.usrfiles.com/ugd/b8c837_a85aa1e089fd48a68b3fad5229d7176d.pdf
    • https://static.usrfiles.com/ugd/c75f60_0c751f187bf24b5bba09aa4b56b00082.pdf
    • https://static.usrfiles.com/ugd/b8c837_72cc9411a6e04e4992ef968791678a7a.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_off000053d0.bin
b802e5d28b5828b5432a7b903f8b69fd11ca7f0c27cf05b7dde00662faa554fa
pdf-font-stream PDF embedded font (sfnt) at offset 0x53D0 5352 bytes
font_01_sfnt_off00006605.bin
dc3a8de956e98679668c56c7f96c245c5ae1b3cc3901b4d2cc4f6613f44a338e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6605 10660 bytes