Malicious PDF — malware analysis report

Static analysis result for SHA-256 2837409f9a7cf013…

MALICIOUS

PDF

32.5 KB Created: 2020-08-24 06:03:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 608f9892d05edacc814d1f2b1f6f2f22 SHA-1: 7188a196d51ce09cf54f155e74ad893c4b34e091 SHA-256: 2837409f9a7cf013b9cfff1dd69b45dbe0c47dc4d137f025fc7865cc3fca0f63
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.001 User Execution: Malicious Link T1059.001 PowerShell

The PDF file contains a large number of embedded links, many of which point to potentially malicious redirectors or unknown domains. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains references to the malicious URL and other URLs that appear to be part of a link farm designed to manipulate search engine results. No scripts were extracted, but the primary attack vector appears to be social engineering through deceptive links.

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=bhojpuri+song+dj+2018
    • http://files.4sapservices.com/uploads/1/3/1/4/131407445/botunewizewame_kofiteja.pdf
    • http://vabeni.saarticambodia.com/uploads/1/3/2/8/132814930/gaboxaberevix-kanetofap.pdf
    • https://cdn.shopify.com/s/files/1/0432/2122/1533/files/voice_operated_induction_motor_speed_control_through_rf_communication.pdf
    • https://cdn.shopify.com/s/files/1/0431/8307/9584/files/chennai_express_movie_video_song_bestwap.pdf
    • https://cdn.shopify.com/s/files/1/0431/5221/2130/files/angielski_dla_pocztkujcych_ksika.pdf
    • https://cdn.shopify.com/s/files/1/0432/2190/9659/files/64112127668.pdf
    • https://cdn.shopify.com/s/files/1/0432/5795/4467/files/acca_f9_study_text_2020_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0459/9077/2895/files/vobuwozuwiw.pdf
    • https://cdn.shopify.com/s/files/1/0430/6354/1917/files/newspaper_articles_on_crime_in_south_africa_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1031/files/sawizazebanavebikabidifox.pdf
    • https://cdn.shopify.com/s/files/1/0428/2338/5247/files/autocad_commands_list_in.pdf
    • https://cdn.shopify.com/s/files/1/0433/5501/3275/files/administracion_publica_privada_y_mixta.pdf
    • https://cdn.shopify.com/s/files/1/0429/5832/3865/files/susabadu.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_off00004270.bin
f5efc69eb4ecd3fd6c5c28299d0732722815e34475afc1f568ea7f7712c8addc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4270 5624 bytes
font_01_sfnt_off0000559f.bin
d0c6c78b46f638d8ea754a9e4c92a1b2952c819fe9b99196e72ef16c73073f98		 pdf-font-stream PDF embedded font (sfnt) at offset 0x559F 9304 bytes

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