Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcebaf03beded8aa…

MALICIOUS

PDF

55.5 KB Created: 2020-08-08 20:44:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a93e2db830163a27439ee69ada75b1e9 SHA-1: e8645c9e28057fb9f46b4451995553179b0da924 SHA-256: dcebaf03beded8aa801f3aa77707e9681f1189891717a2f700bfc967ce6c9006
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 external PDFs hosted on various domains, including a known malicious redirector. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector. This suggests a phishing or social engineering attack aiming to redirect the user to malicious content.

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=ethnic+conflict+in+africa+pdf
    • http://files.brookescookiesnorman.com/uploads/1/3/1/4/131409526/dewelinojanixo.pdf
    • http://dogon.rfvhorsecouncil.org/uploads/1/3/2/6/132682883/jozegadodu.pdf
    • http://bunokele.piedmontsaltwaterfishingclub.com/uploads/1/3/1/4/131406082/3984454.pdf
    • https://cdn.shopify.com/s/files/1/0431/3330/4981/files/56696063531.pdf
    • https://cdn.shopify.com/s/files/1/0435/7141/3160/files/vietnam_labour_law_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/5352/2850/files/fiwiwi.pdf
    • https://cdn.shopify.com/s/files/1/0430/0655/8359/files/masijajewipudo.pdf
    • https://cdn.shopify.com/s/files/1/0432/4887/7736/files/pewuvejogejanuvuju.pdf
    • https://cdn.shopify.com/s/files/1/0429/7709/9935/files/xanosukawido.pdf
    • https://cdn.shopify.com/s/files/1/0436/4982/6969/files/dozoxepakum.pdf
    • https://cdn.shopify.com/s/files/1/0449/5589/3928/files/aluminium_6061_mechanical_properties.pdf
    • https://cdn.shopify.com/s/files/1/0435/8832/1443/files/fexagegi.pdf
    • https://cdn.shopify.com/s/files/1/0431/5050/8194/files/punjab_textbook_physics_9th_class.pdf
    • https://cdn.shopify.com/s/files/1/0434/3024/8600/files/personal_pronouns_table.pdf
    • https://cdn.shopify.com/s/files/1/0439/0731/7912/files/warhammer_40k_space_marine_codex_7th_edition.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_off00009301.bin
92cedf124e672b47873b8bc8572e164c78a9cb538b4947aeb74033f0c7730072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9301 5024 bytes
font_01_sfnt_off0000a417.bin
887f25e980b5c84eedb5d734b03d28fdc39debce3524f653398239b8bd81f248		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA417 14560 bytes

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