Malicious PDF — malware analysis report

Static analysis result for SHA-256 feb69038a6c3cdd0…

MALICIOUS

PDF

40.1 KB Created: 2020-08-07 15:26:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e27aaf2fc3e00e287d9c7c32733ffe0d SHA-1: 751302dcd3de9caab19022ea675d1928172900a2 SHA-256: feb69038a6c3cdd08007b5bf553759d7504396c3ff90add5e6ad6926579ddd1c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link farm with numerous embedded URLs, including a primary malicious redirector. The ML classifier strongly indicated maliciousness. The primary malicious URL is https://ttraff.com/pify?keyword=abn+registration+form+pdf, which is presented as an 'ABN registration form PDF' to lure users into clicking. No scripts were extracted, but the PDF structure and embedded links are indicative of a phishing or redirection campaign.

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.com/pify?keyword=abn+registration+form+pdf
    • http://files.livybella.com/uploads/1/3/1/3/131384127/regegejowezixu.pdf
    • http://files.effective-leadership.com/uploads/1/3/1/4/131438137/156099.pdf
    • http://files.rsvpvolunteercaregivers.org/uploads/1/3/2/6/132681824/navate.pdf
    • https://cdn.shopify.com/s/files/1/0427/4146/5244/files/71302342539.pdf
    • https://cdn.shopify.com/s/files/1/0436/9996/2024/files/dojage.pdf
    • https://cdn.shopify.com/s/files/1/0430/1104/7575/files/62147892517.pdf
    • https://cdn.shopify.com/s/files/1/0432/4222/5831/files/install_mongodb_ubuntu_15._10.pdf
    • https://cdn.shopify.com/s/files/1/0427/8861/8396/files/numoj.pdf
    • https://cdn.shopify.com/s/files/1/0427/7954/1671/files/64277876941.pdf
    • https://cdn.shopify.com/s/files/1/0430/3205/1873/files/tagef.pdf
    • https://cdn.shopify.com/s/files/1/0440/5651/0616/files/katelitabuxow.pdf
    • https://cdn.shopify.com/s/files/1/0433/5498/0505/files/xalat.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/engineering_mechanics_statics_14th_edition_solutions.pdf
    • https://cdn.shopify.com/s/files/1/0428/4933/7507/files/36441431291.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/7600077746.pdf
    • https://cdn.shopify.com/s/files/1/0431/9015/7474/files/pneumatic_and_hydraulic_actuators.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/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ea3.bin
62bc94215b9e4810b481650a23e28a2283d95d61e3cdc920b785d89feb3fa97f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5EA3 5456 bytes
font_01_sfnt_off00007119.bin
20f4ceda702f6852b589e27a0dffbf5fea6199cca2b6eaacecfd018af41662b4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7119 10012 bytes