Malicious PDF — malware analysis report

Static analysis result for SHA-256 07eee7afb8ca0e82…

MALICIOUS

PDF

34.9 KB Created: 2020-09-14 15:20:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b8e75096efd98be5e423c23cdbe33622 SHA-1: 233ccb57971b602de6d930fd36d8b044cc7547af SHA-256: 07eee7afb8ca0e82d5778df251f5764900e6f202c5f266fc8308aa8218a113f4
154 Risk Score

Malware Insights

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

The PDF contains embedded links, one of which, https://ttraff.ru/wb?keyword=fedders%20a6x06f2a%20manual, is flagged as a malicious redirector. The document also exhibits characteristics of a link farm, with numerous external PDF links, suggesting an attempt to distribute malicious content or engage in SEO manipulation. The ML classifier strongly indicates maliciousness.

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/wb?keyword=fedders%20a6x06f2a%20manual
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a91264_60341541259e46ca84930b4a46bbdbef.pdf
    • https://static.usrfiles.com/ugd/b8c837_3e30738be028449b907ad1437567bbaf.pdf
    • https://static.usrfiles.com/ugd/60e703_8742c23f3dd04c74a6b9d69000085d2b.pdf
    • https://static.usrfiles.com/ugd/b80405_24951f61958847bd8ab94c5892a83409.pdf
    • https://cdn.shopify.com/s/files/1/0437/8948/4190/files/54097715548.pdf
    • https://cdn.shopify.com/s/files/1/0465/2780/7646/files/gasomoforakavukutawib.pdf
    • https://static.usrfiles.com/ugd/74147a_066c7a25b9e640259f956833b02fe5f4.pdf
    • https://static.usrfiles.com/ugd/bca722_04bb8d59b50f45e3a839c8169a02f0ba.pdf
    • https://static.usrfiles.com/ugd/f5892c_58f1b0bf6b8040cfa8951745a25dff7c.pdf
    • https://cdn.shopify.com/s/files/1/0471/0400/0150/files/nutrition_information_subway_meatball_sub.pdf
    • https://cdn.shopify.com/s/files/1/0433/5386/6408/files/kexapikitabidalusidi.pdf
    • https://cdn.shopify.com/s/files/1/0435/7239/6193/files/noughts_and_crosses_book.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_off000049d5.bin
a22b43745e0b8df1ef96f029d5c8736bb7f762c207920055379512d5fae72fd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x49D5 5504 bytes
font_01_sfnt_off00005c7d.bin
d5399aa6fc376e17170f6aedbadb17606e645c5a83d9dd28a53d83adfce633f4
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C7D 10232 bytes