Malicious PDF — malware analysis report

Static analysis result for SHA-256 61d97dbb51fb67ef…

MALICIOUS

PDF

48.4 KB Created: 2020-09-06 16:08:27 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0da98bd3929f1676481728e05f0796d8 SHA-1: a88666d8760cd23e925556f73446126d5bc4ce9f SHA-256: 61d97dbb51fb67ef362cf42c186bcd5f8cc80a4a74f6006bbab554ef3b21d9e5
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. This suggests the document is part of a link farm or SEO poisoning campaign designed to drive traffic to malicious sites. The ML classifier also strongly indicated maliciousness, supporting the presence of malicious redirector infrastructure.

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.club/wix?keyword=rome+2+divide+et+impera+building+guide
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0430/0151/2090/files/fancy_pants_adventure_1_for_pc.pdf
    • https://cdn.shopify.com/s/files/1/0431/4903/3627/files/sanerupotufeguwalipezaroz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7920/5013/files/jezoziwiza.pdf
    • https://cdn.shopify.com/s/files/1/0434/1481/4885/files/tesla_model_s_manual_hood_release.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6165/files/astronomy_books_in_urdu.pdf
    • https://cdn.shopify.com/s/files/1/0432/3141/2379/files/jevekigowekilukabidin.pdf
    • https://cdn.shopify.com/s/files/1/0436/5726/5305/files/92597467120.pdf
    • https://static.usrfiles.com/ugd/e5cbe5_26bc7725fc7b44cba42b63939f139b97.pdf
    • https://static.usrfiles.com/ugd/0baf77_e7e55ccb60d24ec0beddad57467ff628.pdf
    • https://static.usrfiles.com/ugd/cc3ca9_bbd33f29628f4b6a8031351385268a2c.pdf
    • https://static.usrfiles.com/ugd/409ca8_4eaab3004736443491aeceab21207d06.pdf
    • https://static.usrfiles.com/ugd/9ea91e_f400281ab4674d8f911dbc0c44edc3bf.pdf
    • https://static.usrfiles.com/ugd/2b98a3_5d54f70dea014bceac1b0734806a6609.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_off00007ced.bin
5800cc28220c9d970c9207c806333947b96579c865d7ea80c80c823cad19f4e5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CED 5440 bytes
font_01_sfnt_off00008f60.bin
6b15dca7e69776c7fed5ed3db318db1e92e5d91fc25b6300f3a82808fcdde8a5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8F60 11060 bytes