Malicious PDF — malware analysis report

Static analysis result for SHA-256 900e45aba61737d4…

MALICIOUS

PDF

42.6 KB Created: 2020-08-29 13:58:44 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec5ab8c727ef7d705230ad0c23d05df8 SHA-1: 3c52de80f636ebe2bbf32a4ccd693b939c9ffbbf SHA-256: 900e45aba61737d4629c5ee84e14d0ff518ec24df8e32f95c4d59b9bf7aa28c1
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'https://ttraff.com/wix?keyword=fsx+acceleration+addon+download'. This URL is presented within the document body, suggesting a social engineering lure to trick the user into visiting a malicious site. The ML classifier also strongly indicated 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.com/wix?keyword=fsx+acceleration+addon+download
    • https://static.u
    • https://cdn.shopify.com/s/files/1/0433/3705/6415/files/ortopedia_pediatrica.pdf
    • https://cdn.shopify.com/s/files/1/0440/8197/1365/files/88710611243.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8007882555.pdf
    • https://cdn.shopify.com/s/files/1/0437/6399/0686/files/leaving_the_body_a_practical_guide_to_astral_projection.pdf
    • https://cdn.shopify.com/s/files/1/0431/4791/9516/files/factoring_polynomials_gcf.pdf
    • https://cdn.shopify.com/s/files/1/0434/6213/1869/files/application_of_adsorption_chromatography.pdf
    • https://static.usrfiles.com/ugd/b8c837_6750a3ee64b34a2597d692cbba752b09.pdf
    • https://static.usrfiles.com/ugd/b8c837_e7651669e1064a968952ffd9e7985694.pdf
    • https://static.usrfiles.com/ugd/b8c837_d26cb12c52a44130914d4c5577b4c534.pdf
    • https://static.usrfiles.com/ugd/b8c837_bb9c164d9f764af6adca72799d9bd272.pdf
    • https://static.usrfiles.com/ugd/b8c837_358530d5d96745719cec97db95ba54e3.pdf
    • https://cdn.shopify.com/s/files/1/0434/1796/0600/files/calculus_3_tutorial.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6507/files/bifanav.pdf
    • https://cdn.shopify.com/s/files/1/0430/0737/7567/files/xijafitotif.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_off00006824.bin
4d86c2be872aa7e7923662e5dd85bbcea205cc39d16557f13791bfef29801dd7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6824 5048 bytes
font_01_sfnt_off0000796e.bin
97c53f2e448e4ed28e9e5ce3e6c608f9f9846e2268cd21b13bbf193a9b898f63
pdf-font-stream PDF embedded font (sfnt) at offset 0x796E 10544 bytes