Malicious PDF — malware analysis report

Static analysis result for SHA-256 94d655cbada7dfbf…

MALICIOUS

PDF

71.0 KB Created: 2020-08-30 14:44:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f77297f5e17db1a783bb44913be023a1 SHA-1: df8795d27d0efed62e42739760596550fa115bf7 SHA-256: 94d655cbada7dfbf34c4ba1ccc0ac513d3c33d9e3522f304c9e9fb570de1a9ee
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by an ML classifier and contains a critical heuristic indicating it links to known malicious redirector infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious URL identified is https://ttraff.cc/wix?keyword=videos+de+mortes+ogrish+f%25C3%25B3rums, which is likely used to lure victims into malicious sites.

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=videos+de+mortes+ogrish+f%25C3%25B3rums
    • https://static.usrfiles.com/ugd/067ecb_f673b077a4bc4e1f88fca10627c01b83.pdf
    • https://static.usrfiles.com/ugd/89c6ad_53bd0913666f4bac8cf621218fb239c8.pdf
    • https://static.usrfiles.com/ugd/ca32a8_00d1be1b55c84ecf8249a53ec6484a6d.pdf
    • https://static.usrfiles.com/ugd/b8c837_b82d6f5d1dbb47118c68a5ff1168ab42.pdf
    • https://cdn.shopify.com/s/files/1/0431/4248/0021/files/zonuregedaxin.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/pizza_topping_combinations.pdf
    • https://cdn.shopify.com/s/files/1/0437/2699/5621/files/49153962252.pdf
    • https://cdn.shopify.com/s/files/1/0433/7801/6406/files/cacti_rrdtool_windows.pdf
    • https://cdn.shopify.com/s/files/1/0459/1678/2741/files/86438113353.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/97072231683.pdf
    • https://cdn.shopify.com/s/files/1/0435/5204/7255/files/delta_airline_sustainability_report.pdf
    • https://cdn.shopify.com/s/files/1/0445/3846/2372/files/b_l_theraja_basic_electronics.pdf
    • https://cdn.shopify.com/s/files/1/0437/4488/6936/files/autoimmunity_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0436/3649/0398/files/how_do_abiotic_factors_affect_biotic_factors_in_the_desert.pdf
    • https://cdn.shopify.com/s/files/1/0435/7967/0689/files/23331506033.pdf
    • https://cdn.shopify.com/s/files/1/0462/9502/3776/files/nata_sarvabhouma_songs_download.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_off0000d2c7.bin
c007ca23aa05b85f750ccf473fe9968ca2303867282f8637f2fdf5d0ffc5b691		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD2C7 5180 bytes
font_01_sfnt_off0000e409.bin
1f3b7efe59e0c784559a10f9ae8195a060bfca5461aadb7a017fb185f8ae1ec7		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE409 13528 bytes

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