Malicious PDF — malware analysis report

Static analysis result for SHA-256 179eda1efdb3ad68…

MALICIOUS

PDF

45.6 KB Created: 2020-09-02 02:43:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a258cfc99438f3e9393b0f230a2ba950 SHA-1: be3dbc00f17575316a05be6cfe62e93486f001e2 SHA-256: 179eda1efdb3ad684064a6a7126ebfb597647d8234b9d3916c867a852b36430b
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector infrastructure. The document body is heavily obfuscated but contains a URL that appears to be part of a link farm, likely for SEO manipulation or to distribute malicious content. 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=brother+dcp+l2540dw+specs+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0437/5828/9045/files/the_armor_of_god_priscilla_shirer.pdf
    • https://cdn.shopify.com/s/files/1/0431/6377/9236/files/movudusewuduvajuvezafemeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/2093/5590/files/kojusidenujoxad.pdf
    • https://cdn.shopify.com/s/files/1/0437/3407/3505/files/kifonejugafujotit.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/monazata.pdf
    • https://static.usrfiles.com/ugd/b8c837_cc49fc282ce94bc688b41131689e017e.pdf
    • https://static.usrfiles.com/ugd/b8c837_e05324d297dc4267af379c80f65fd9a1.pdf
    • https://static.usrfiles.com/ugd/7d21c0_45d15c6b62704eecb5b0f8921e52238d.pdf
    • https://static.usrfiles.com/ugd/83f04e_095e793b392e4e0b97970fd566d8bed0.pdf
    • https://static.usrfiles.com/ugd/c0b427_88383328ec0349429f3046d487f6168b.pdf
    • https://static.usrfiles.com/ugd/b91566_6517b9ad73a3478fa104fb29437fda31.pdf
    • https://static.usrfiles.com/ugd/64e449_5fcce6e3415a4cb9b7170a1ad23d27d8.pdf
    • https://static.usrfiles.com/ugd/3e9e83_f6f9d2286661411babb618949d9f4121.pdf
    • https://static.usrfiles.com/ugd/b3bc21_71eba1f5deb1490c91ffbd5e90914e2f.pdf
    • https://cdn.shopify.com/s/files/1/0434/8028/5348/files/cisco_bgp_configuration_example.pdf
    • https://cdn.shopify.com/s/files/1/0438/2290/7549/files/xitex.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_off000066da.bin
ba5ebd5d6bfd2adf89b39ecf0d205e32b31d4b6b93cdfe5a153f110b958e398c
pdf-font-stream PDF embedded font (sfnt) at offset 0x66DA 5660 bytes
font_01_sfnt_off00007a42.bin
650bf19e763562080af3d3bc033f89dee514a1f5b89a4b5530e8e5582737edbc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A42 15296 bytes