Malicious PDF — malware analysis report

Static analysis result for SHA-256 fbcaf3fe96f5ce47…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 04:12:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bde8b89ed439690bc62cc98cfc8f55fc SHA-1: c21ea1c4a2d9bb713432efa6748ad4b8cf2f6c46 SHA-256: fbcaf3fe96f5ce472433f8b2c1a5d8f27286f4ec7bca7028b6494dada267a374
150 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a known malicious domain, ttraff.com, disguised as performance appraisal information. This heuristic firing, combined with the ML classifier's high confidence, indicates a malicious redirector is in use. The document body contains obfuscated text and the target URL, suggesting a social engineering lure to drive traffic to malicious infrastructure.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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/pify?keyword=performance+appraisal+sample+wording+decision+making
    • http://files.princetonshowjumping.com/uploads/1/3/1/6/131607331/papejipufowedewika.pdf
    • http://fodir.kristakorkiakoski.com/uploads/1/3/1/4/131482975/lewaro_sofiwugegofujis.pdf
    • https://cdn.shopify.com/s/files/1/0433/8404/5719/files/71514896102.pdf
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/college_hoop_2k7.pdf
    • https://cdn.shopify.com/s/files/1/0428/0185/6668/files/r_repeated_measures_anova.pdf
    • https://cdn.shopify.com/s/files/1/0433/4957/3784/files/wababaxebizidavikujikegi.pdf
    • https://cdn.shopify.com/s/files/1/0440/8590/3525/files/kubofasinusumukasifogegor.pdf
    • https://cdn.shopify.com/s/files/1/0431/0653/3525/files/world_cup_2019_match_date_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0432/3773/6603/files/50757657524.pdf
    • https://cdn.shopify.com/s/files/1/0435/8746/9469/files/chelating_agents_and_metal_chelates.pdf
    • https://cdn.shopify.com/s/files/1/0430/0665/6666/files/jimaniliniferu.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_off000064ee.bin
d6adfcf3fbed768f37d60185e84edb71bd222083323ea5fef09e35e644c57792		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64EE 5632 bytes
font_01_sfnt_off00007808.bin
5737f9371919ac5f1e739d73c5eb7b909d34fe10b6afef69078ef593facd70cb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7808 10196 bytes

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