Malicious PDF — malware analysis report

Static analysis result for SHA-256 19e73b3ed5824d09…

MALICIOUS

PDF

39.7 KB Created: 2020-08-23 03:37:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a74efa19a9e7419364d8d3fd9b3202b4 SHA-1: eb5ba85bba269eb1ce00a75669e4183499140f54 SHA-256: 19e73b3ed5824d0965c35ab3189901487596204529b67776581b80892bd47072
150 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with the primary malicious redirector being ttraff.cc. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK confirms this, indicating the document's purpose is to lure users to malicious infrastructure. The ML_NYX_PDF_MALICIOUS score further supports the malicious nature of the file. No scripts were extracted, but the presence of a malicious redirector is sufficient evidence of malicious intent.

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.cc/pify?keyword=anemia+falciforme+pdf+ministerio+da+saude
    • http://files.rabbitmountainlavender.com/uploads/1/3/1/4/131454216/menasomokovixa.pdf
    • http://lexino.boreckyfruitfarm.com/uploads/1/3/1/4/131438008/26bea.pdf
    • http://files.leighandbloo.com/uploads/1/3/0/7/130775623/d1a3850.pdf
    • https://cdn.shopify.com/s/files/1/0431/4470/8245/files/72024873476.pdf
    • https://cdn.shopify.com/s/files/1/0427/6482/8838/files/23093207494.pdf
    • https://cdn.shopify.com/s/files/1/0433/5104/8357/files/builders_html_template_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/0926/1217/files/23514700960.pdf
    • https://cdn.shopify.com/s/files/1/0428/8430/0959/files/cathode_ray_experiment.pdf
    • https://cdn.shopify.com/s/files/1/0430/0128/2711/files/45885670218.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/agenda_web_present_continuous.pdf
    • https://cdn.shopify.com/s/files/1/0435/1826/3448/files/sample_action_research_proposal_in_ethiopia.pdf
    • https://cdn.shopify.com/s/files/1/0430/8893/7120/files/fiseva.pdf
    • https://cdn.shopify.com/s/files/1/0435/2301/4824/files/naina_song_video.pdf
    • https://cdn.shopify.com/s/files/1/0439/2547/1400/files/jurnal_penelitian_bronkopneumonia.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/83724768086.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_off00005da5.bin
b1ddf226b79cd23f7f1a895391eba5eb652ac50bc41213d52d5f37325f20dadd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DA5 5288 bytes
font_01_sfnt_off00006f7e.bin
18aba8fb3155c684f1780bb07791de7f3d146db14f582b76983f04425dfca573		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F7E 10296 bytes

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