Malicious PDF — malware analysis report

Static analysis result for SHA-256 829fb4df3825299e…

MALICIOUS

PDF

43.7 KB Created: 2020-08-31 07:29:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1b2fe0719e8776d3db6b74857abcec2f SHA-1: 53770eaf8effef441eb4d5f29069e26628968d18 SHA-256: 829fb4df3825299ed9fab17014e57abde33355ccdad32ccee0a08d10becd7e8f
152 Risk Score

Malware Insights

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

The PDF document was flagged by a machine learning model as malicious and contains numerous embedded links. One of these links, 'https://ttraff.com/wix?keyword=mage+tower+artifact+appearances', points to known malicious redirector infrastructure. The document's structure suggests it is part of a link farm designed to distribute malicious content or lead users to phishing sites.

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=mage+tower+artifact+appearances
    • https://static.usrfiles.com/ugd/33a2e4_30af46dacd1d4ca6919e40d802aac107.pdf
    • https://static.usrfiles.com/ugd/f3cb45_9f39d96535a546668bd99c9cb7e8fd88.pdf
    • https://static.usrfiles.com/ugd/4f270c_d8b386d1d3254481977d3064fcd5a86d.pdf
    • https://static.usrfiles.com/ugd/e78b77_dcaea2d2db9b42daa0b4a6f1d167cb8c.pdf
    • https://cdn.shopify.com/s/files/1/0447/8880/9879/files/causes_of_occupational_diseases.pdf
    • https://cdn.shopify.com/s/files/1/0433/7372/3800/files/23054568086.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/foferagazovowetekekiselo.pdf
    • https://cdn.shopify.com/s/files/1/0459/8090/9735/files/n15235_manual_foxconn.pdf
    • https://static.usrfiles.com/ugd/ec0c41_49f39415f51a4f4ab6a31442c3e6d053.pdf
    • https://static.usrfiles.com/ugd/de3d83_14158472ee2f4e03b894ee2062b6030e.pdf
    • https://static.usrfiles.com/ugd/f46427_33a6d25b31fe48779770cdd996da684e.pdf
    • https://static.usrfiles.com/ugd/efb3f0_69366428518943b0b3c0c3b9b7b90101.pdf
    • https://static.usrfiles.com/ugd/b8c837_cfcda2e4e5bd4a3d8b7503cf0da89f99.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f0c.bin
aaeeb0c6b227c851c5b790786c65cc6149381dad46786d6e2e56680a05424a75
pdf-font-stream PDF embedded font (sfnt) at offset 0x5F0C 5036 bytes
font_01_sfnt_off00007054.bin
87a0b284b775327057aa5d0a299607b93b679f4bc36364771b2f4bea2f98590d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7054 10420 bytes
font_02_sfnt_off000093ec.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e
pdf-font-stream PDF embedded font (sfnt) at offset 0x93EC 4324 bytes