Malicious PDF — malware analysis report

Static analysis result for SHA-256 60efe506f003f725…

MALICIOUS

PDF

48.3 KB Created: 2020-08-23 01:01:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bca79f9de16b7141f3f8622d7041cf55 SHA-1: 53e5b5110406192affe01583d9f737c0f195daea SHA-256: 60efe506f003f725e7ec6e5e1506ec354374f655ad6a64fe2dd46bbb0199ea15
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body, though partially corrupted, contains a URL that matches the redirector found in the heuristics, suggesting an attempt to lure users to malicious sites for further exploitation.

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.com/pify?keyword=android+google+analytics+vs+firebase
    • http://topog.boostfitness.co.uk/uploads/1/3/1/4/131406798/xereladatutifuvixaf.pdf
    • http://files.squirrelimprov.com/uploads/1/3/1/8/131857465/xapiwolisakake.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/23535065851.pdf
    • https://cdn.shopify.com/s/files/1/0434/3113/3340/files/bisection_method_step_by_step.pdf
    • https://cdn.shopify.com/s/files/1/0432/2073/0011/files/koputofukug.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1651/files/coordinate_grid_test.pdf
    • https://cdn.shopify.com/s/files/1/0428/5235/2159/files/25631308139.pdf
    • https://cdn.shopify.com/s/files/1/0429/2942/2499/files/76768136991.pdf
    • https://cdn.shopify.com/s/files/1/0431/2812/7645/files/mabederokokamevodaguwev.pdf
    • https://cdn.shopify.com/s/files/1/0427/8000/0422/files/somezuxadetuj.pdf
    • https://cdn.shopify.com/s/files/1/0451/4293/3657/files/adenosina_deaminase.pdf
    • https://cdn.shopify.com/s/files/1/0430/8051/5745/files/67237381637.pdf
    • https://cdn.shopify.com/s/files/1/0428/0342/9535/files/bajuxiwenotedatam.pdf
    • https://cdn.shopify.com/s/files/1/0432/9072/2454/files/chillerama_full_movie_in_tamil.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007f60.bin
e4a0209015ac35c1b5239225ff4e06d397aa7d02bab59f3c41c6193cc1975c3b
pdf-font-stream PDF embedded font (sfnt) at offset 0x7F60 5480 bytes
font_01_sfnt_off00009218.bin
a015e0d5d6b933b3b0899feb65ca8870ce460efebe728c89752c51235794b4cb
pdf-font-stream PDF embedded font (sfnt) at offset 0x9218 10120 bytes