Malicious PDF — malware analysis report

Static analysis result for SHA-256 41d74fc3fbd25e9a…

MALICIOUS

PDF

42.9 KB Created: 2020-08-07 02:11:01 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 98f08d7ca192f2138216af3512c10383 SHA-1: e68617a2560be832517fc3a346e5a7e8e1e71bda SHA-256: 41d74fc3fbd25e9a86c479227837a2843ab8254186d5bcf33df6af201c68db54
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com, and one critical link to a known malicious redirector at ttraff.com. This indicates a phishing or redirection attempt to distribute further malware or content. The ML classifier strongly supports the malicious nature of this PDF.

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=real+audiencia+de+charcas+pdf
    • http://files.brothersphotographers.com/uploads/1/3/0/7/130739892/ec67a2bb4035a30.pdf
    • http://files.vivocollegemusic.com/uploads/1/3/1/1/131164052/7408558.pdf
    • http://rejemufi.monetwithacamera.com/uploads/1/3/0/7/130776791/c328fd0df175.pdf
    • http://wiluv.norwellgiving.com/uploads/1/3/1/4/131454065/3095538.pdf
    • https://cdn.shopify.com/s/files/1/0429/4891/9450/files/paliluzoxaxagojeniru.pdf
    • https://cdn.shopify.com/s/files/1/0429/7375/7603/files/achilles_tendon_strain_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0432/9881/6150/files/robavifegojugubetuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/3177/9733/files/somibozi.pdf
    • https://cdn.shopify.com/s/files/1/0429/1428/3686/files/wurovexifawajidabariro.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/codiers_smash_fm.pdf
    • https://cdn.shopify.com/s/files/1/0435/9897/1038/files/95797428599.pdf
    • https://cdn.shopify.com/s/files/1/0433/3699/0885/files/what_is_a_line_break.pdf
    • https://cdn.shopify.com/s/files/1/0430/4338/9597/files/metabolism_of_sulphur_containing_amino_acids.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pajovi.pdf
    • https://cdn.shopify.com/s/files/1/0428/5156/5724/files/storytelling_as_a_teaching_tool.pdf
    • https://cdn.shopify.com/s/files/1/0436/8538/0246/files/rojow.pdf
    • https://cdn.shopify.com/s/files/1/0439/6616/9246/files/46622499678.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_off00006684.bin
18f84b76beffc82a70803c1db33ea7480a55daffac6c3429acb8cd13e149c3d9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6684 5248 bytes
font_01_sfnt_off0000785c.bin
30729aa547168d870d98a7a04a07fc09646380d9d3d5f0f7ec7f8e6d695d2724		 pdf-font-stream PDF embedded font (sfnt) at offset 0x785C 11348 bytes

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