Malicious PDF — malware analysis report

Static analysis result for SHA-256 2486513e5b8cdab2…

MALICIOUS

PDF

44.4 KB Created: 2020-08-15 23:31:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d6888f478f2f1f89af8e9d1dd4ea95d5 SHA-1: fc9bbc5b5f24d19980a9bd87238be7c889dac166 SHA-256: 2486513e5b8cdab2803323e3e39e4fe18a7b0552f17b21d0fc815aba3e3250e4
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources, a common tactic for SEO link farms and redirecting users to malicious sites. One critical heuristic firing indicates a direct link to a known malicious redirector at 'https://ttraff.com/wb?keyword=linear%20separability%20in%20neural%20networks%20pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other PDF links, reinforcing the attack pattern of luring users through a deceptive document.

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/wb?keyword=linear%20separability%20in%20neural%20networks%20pdf
    • http://files.augsburgtoledo.org/uploads/1/3/0/7/130776886/tifemowegajo.pdf
    • http://files.iwstreecare.com/uploads/1/3/2/7/132740479/wogupu-zukokitoruwogog-zikezugufada-pubuzesilas.pdf
    • http://ribojuzal.nickboocock.com/uploads/1/3/2/6/132681556/duxikipazosiz.pdf
    • http://files.fforegon.org/uploads/1/3/0/9/130969703/8459230.pdf
    • http://files.mcrudin.com/uploads/1/3/1/3/131398187/bisemurezo-jumixol-rumavaf-zidatoluzipipub.pdf
    • https://cdn.shopify.com/s/files/1/0433/4757/4949/files/megafosen.pdf
    • https://cdn.shopify.com/s/files/1/0433/9980/7126/files/90704106643.pdf
    • https://cdn.shopify.com/s/files/1/0428/4488/1059/files/87501895987.pdf
    • https://cdn.shopify.com/s/files/1/0438/4869/5958/files/what_is_nper_in_excel.pdf
    • https://cdn.shopify.com/s/files/1/0433/6589/2261/files/90968347003.pdf
    • https://cdn.shopify.com/s/files/1/0440/8626/3960/files/27593084864.pdf
    • https://cdn.shopify.com/s/files/1/0437/7857/2450/files/83887443705.pdf
    • https://cdn.shopify.com/s/files/1/0434/3840/7845/files/annexure_d_for_minor_passport.pdf
    • https://cdn.shopify.com/s/files/1/0433/6913/6284/files/conditions_of_marriage_in_islam.pdf
    • https://cdn.shopify.com/s/files/1/0431/2167/2356/files/zoxabatulifevipipuru.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_off000057a6.bin
108f7a344a71bff43db4ed459f161211eafa8dd0089b2bb3a715f9a71fd0570a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x57A6 5372 bytes
font_01_sfnt_off00006a0c.bin
b9a02486763f50275272393f551e757c51d0c9d707f8c6ee1b4e038a7a3714f4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0C 10740 bytes
font_02_sfnt_off00008efe.bin
7b409c340078342871d25afff08905e57020809e2bc8ca3773b6f897f80384b1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8EFE 16204 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.