Malicious PDF — malware analysis report

Static analysis result for SHA-256 f166fa61d597871f…

MALICIOUS

PDF

41.8 KB Created: 2020-08-31 09:20:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e7f85f47074bdfcb27735802252b2832 SHA-1: da04397f2b08f7b03e1e35de10cc1d18bff9fec0 SHA-256: f166fa61d597871f05514fb49f1cf20934e6b4819c4e3d554e91dd93f9cc20f5
154 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.cc/wix?keyword=scale+drawings+of+geometric+figures', is identified as a malicious redirector. The document's primary purpose appears to be to direct users to this malicious URL, likely for further exploitation or phishing. No scripts were extracted from this sample.

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/wix?keyword=scale+drawings+of+geometric+figures
    • https://cdn.shopify.com/s/files/1/0439/8107/8686/files/psychology_themes_and_variations.pdf
    • https://cdn.shopify.com/s/files/1/0428/2286/0966/files/mercantilismo_capitalismo_e_imperialismo.pdf
    • https://cdn.shopify.com/s/files/1/0429/6366/5055/files/rotunenetopoberizobiwok.pdf
    • https://cdn.shopify.com/s/files/1/0434/9699/7030/files/12105072604.pdf
    • https://cdn.shopify.com/s/files/1/0437/8119/3885/files/90667906395.pdf
    • https://cdn.shopify.com/s/files/1/0435/6997/1363/files/vertical_axis_wind_turbine_blade_design.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/manual_settings_for_outdoor_portraits.pdf
    • https://cdn.shopify.com/s/files/1/0428/8138/4604/files/kanitatifinizevenet.pdf
    • https://static.usrfiles.com/ugd/cfbfd2_1a949175da0d4aefb18ee76dc4d20a99.pdf
    • https://static.usrfiles.com/ugd/0f5b72_e9e2868eb3dd4fa88f98c9c5377a2d06.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_off000064dc.bin
e86a3d682421f1e6af7d161ae0a8eca68d5c120490b6016d4875f226d9370c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x64DC 5536 bytes
font_01_sfnt_off0000779c.bin
9dd0cbe9f0ccbeb1c2374949978f33af80a0f62ec7461ab32d8daa181691b578		 pdf-font-stream PDF embedded font (sfnt) at offset 0x779C 10288 bytes

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