Malicious PDF — malware analysis report

Static analysis result for SHA-256 dcb42040647d835e…

MALICIOUS

PDF

46.3 KB Created: 2020-08-07 05:25:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d51c8aa2b881da883a1fa434cd4e61d4 SHA-1: d56f57b1ad63a65fbde7fbc6b45bf1b5edb75093 SHA-256: dcb42040647d835eb46da7a78fbf97837ef9c7baaaccb9055279433aa9c23d28
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document body and embedded links suggest a link farm tactic, where numerous links are provided to potentially trick users into downloading further malware or visiting phishing sites. The ML classifier strongly supports the malicious nature of this PDF.

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=toyota+corolla+2020+manual+pdf
    • http://koxed.carolinascentscandlecompany.com/uploads/1/3/1/4/131438474/5401462.pdf
    • http://files.newlifetucson.com/uploads/1/3/1/4/131483097/tewololux.pdf
    • http://pumerake.abcpelican.org/uploads/1/3/1/6/131606407/8204813.pdf
    • http://bovejerez.goldstatus-of-arts.com/uploads/1/3/1/6/131637316/kojafedavixulinu.pdf
    • https://cdn.shopify.com/s/files/1/0440/1856/5278/files/bhagavad_gita_in_telugu_with_meaning_free.pdf
    • https://cdn.shopify.com/s/files/1/0431/8298/1278/files/sonusibut.pdf
    • https://cdn.shopify.com/s/files/1/0429/1392/3228/files/dakitirurowekeka.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8871/files/61332202960.pdf
    • https://cdn.shopify.com/s/files/1/0433/8126/0440/files/2767984165.pdf
    • https://cdn.shopify.com/s/files/1/0430/5013/9801/files/detafirugatimikosupasoba.pdf
    • https://cdn.shopify.com/s/files/1/0428/3331/3958/files/jefeviderosus.pdf
    • https://cdn.shopify.com/s/files/1/0433/4885/2891/files/33545346938.pdf
    • https://cdn.shopify.com/s/files/1/0432/1958/3133/files/boxulojimilunosipotejiba.pdf
    • https://cdn.shopify.com/s/files/1/0447/9585/4997/files/nise_control_systems_engineering_7th_edition.pdf
    • https://cdn.shopify.com/s/files/1/0434/0006/9285/files/99562756973.pdf
    • https://cdn.shopify.com/s/files/1/0430/9817/7693/files/electric_normal_pokemon.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000694a.bin
3798f700bb82d1ba994bca6ffa2086b0998effeeea38bd22473c5e9ffb93808e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x694A 5164 bytes
font_01_sfnt_off00007ab7.bin
574488ef9f2caa3fff7a0a79e9625144e3a59b59cc9448e06d4c137a8e676373		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AB7 10428 bytes
font_02_sfnt_off00009e39.bin
d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E39 4324 bytes

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