Malicious PDF — malware analysis report

Static analysis result for SHA-256 f39f9154095155d8…

MALICIOUS

PDF

48.0 KB Created: 2020-08-21 15:31:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e92955548bd13db7ddc69e095d17696f SHA-1: dce73e53261014e0a87a050493ef41b8b3409ce6 SHA-256: f39f9154095155d8cc5134ce89e7bdef40c00db7e525d8316ec4083716158e59
154 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics indicating malicious redirector links and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains numerous embedded URLs, including a suspicious one pointing to 'ttraff.cc', which is likely used to redirect users to malicious content. The presence of a large number of external links suggests a tactic to distribute malware or phish for credentials.

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.cc/pify?keyword=how+to+hang+sheetrock+in+garage
    • http://tuxom.speededocs.com/uploads/1/3/0/8/130815017/833669.pdf
    • http://files.t3wellness.com/uploads/1/3/0/7/130738915/genelumetosatut_pazeki_molagana.pdf
    • http://koxoson.shawndonahue13.com/uploads/1/3/0/7/130776167/podapirok-pewodamemilajov-regirop.pdf
    • http://taxabux.debatingislam.com/uploads/1/3/0/7/130776407/4684368.pdf
    • https://cdn.shopify.com/s/files/1/0435/1718/2104/files/undertale_mod_for_minecraft_pe.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xagene.pdf
    • https://cdn.shopify.com/s/files/1/0429/1300/5724/files/68602938054.pdf
    • https://cdn.shopify.com/s/files/1/0430/8631/5684/files/benebinufuzuwak.pdf
    • https://cdn.shopify.com/s/files/1/0431/5552/1695/files/pimezofufivepavexama.pdf
    • https://cdn.shopify.com/s/files/1/0454/5645/7880/files/a._n._c._full_form.pdf
    • https://cdn.shopify.com/s/files/1/0430/0495/2735/files/9976212684.pdf
    • https://cdn.shopify.com/s/files/1/0434/2258/0886/files/zibaderebuxamumaf.pdf
    • https://cdn.shopify.com/s/files/1/0435/9693/9427/files/xolalik.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/business_english_handbook_advanced_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/rijebenelulewoso.pdf
    • https://cdn.shopify.com/s/files/1/0432/4923/8184/files/59143653842.pdf
    • https://cdn.shopify.com/s/files/1/0437/2021/2645/files/tepopojuwuzuvu.pdf
    • https://cdn.shopify.com/s/files/1/0462/9148/4832/files/joforuwor.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_off00007e7a.bin
8761913f2e890fb5ab954d04b27daaf23dceb2b8add995743a7c011ffca4f820		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7E7A 5148 bytes
font_01_sfnt_off00009006.bin
8f1a3efa9f538351e157feb702445a9223c68a645ac2a2d5ed7cd7274b05d858		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9006 10368 bytes

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