Malicious PDF — malware analysis report

Static analysis result for SHA-256 3232d0534c3f88c3…

MALICIOUS

PDF

41.6 KB Created: 2020-08-23 13:33:52 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9fb14058e49e4d86cbbb5df790de7012 SHA-1: 4e451718bc58134ae758e9aad852ed4dbd8dcc3a SHA-256: 3232d0534c3f88c3e9388f591fdbbe7dc426ddb2fcf2fb40be3c411f852dc010
150 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by multiple heuristics, including a critical finding for a malicious redirector link and a link farm. The ML classifier also strongly indicated maliciousness. The document body contains garbled text but includes a URL that matches the redirector finding. The presence of numerous embedded links, many pointing to Shopify domains but also including suspicious ones, suggests a tactic to distribute malicious content or phish users. No scripts were extracted from this sample.

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.ru/pify?keyword=kaspersky+antivirus+2018+android
    • http://files.foster-willson.com/uploads/1/3/0/7/130775677/46641.pdf
    • http://files.amcommunications.org/uploads/1/3/0/9/130969790/lipetov.pdf
    • http://wuzama.coppellhistoricalsociety.org/uploads/1/3/2/6/132680974/volosenatole.pdf
    • https://cdn.shopify.com/s/files/1/0435/6590/8123/files/nukosivolatomigopodovexu.pdf
    • https://cdn.shopify.com/s/files/1/0427/5778/3718/files/vufuzeguxega.pdf
    • https://cdn.shopify.com/s/files/1/0429/7054/6329/files/24947257212.pdf
    • https://cdn.shopify.com/s/files/1/0434/6265/6166/files/avee_player_heart_visualizer_template.pdf
    • https://cdn.shopify.com/s/files/1/0432/9832/4638/files/modibovobibiwuzokeroruveb.pdf
    • https://cdn.shopify.com/s/files/1/0434/1471/6572/files/black_s_law_dictionary_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3374/7878/files/vaxekemiwajesike.pdf
    • https://cdn.shopify.com/s/files/1/0432/9373/7110/files/sufemoxajevovilafenirij.pdf
    • https://cdn.shopify.com/s/files/1/0429/5992/9503/files/you_re_the_reason_piano_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0440/7951/3752/files/worthing_high_school_uniform.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_off00006340.bin
429d06f4de23588535f801411637894a7510f12e574afe7ce7e14f839f5c23e0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6340 5636 bytes
font_01_sfnt_off0000768b.bin
2da67833ea4bb51c6b0e7faee0e21411b488a0fdab787bea9d47f9c2864ff723		 pdf-font-stream PDF embedded font (sfnt) at offset 0x768B 10196 bytes

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