Malicious PDF — malware analysis report

Static analysis result for SHA-256 b2e48d4b8c8e7704…

MALICIOUS

PDF

53.2 KB Created: 2020-09-06 00:08:03 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e4bd961537c933b3f3ca5f796d6589dc SHA-1: c6da2be4bf359ba91e4ed178f3b196ab44023922 SHA-256: b2e48d4b8c8e77047a39606482796dff1b30e925a87e99873d17d443e7332882
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link

The PDF file contains numerous embedded links, with a significant number pointing to Shopify-hosted PDF files, suggesting a link farm for SEO manipulation. Crucially, one embedded URL, 'https://ttraff.me/wix?keyword=uniform+dispersion+definition+apes', is identified as a malicious redirector. This indicates the document's primary purpose is to lure users to malicious infrastructure, likely for further exploitation or phishing.

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.me/wix?keyword=uniform+dispersion+definition+apes
    • https://cdn.shopify.com/s/files/1/0435/8779/7160/files/mp4_versus_mp3.pdf
    • https://cdn.shopify.com/s/files/1/0437/7742/5565/files/motor_vehicle_sensors_and_actuators.pdf
    • https://cdn.shopify.com/s/files/1/0431/1747/8044/files/50761372611.pdf
    • https://static.usrfiles.com/ugd/ce0e6d_03b3f1eae2a14709b0a40f30174cc5b3.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/63016720996.pdf
    • https://cdn.shopify.com/s/files/1/0428/1712/6567/files/giwonenavura.pdf
    • https://cdn.shopify.com/s/files/1/0432/2256/5032/files/birads_2020_download.pdf
    • https://cdn.shopify.com/s/files/1/0430/4823/9257/files/answer_machine_on_iphone_5.pdf
    • https://cdn.shopify.com/s/files/1/0463/8585/6667/files/raludavadejejuge.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/83997535264.pdf
    • https://cdn.shopify.com/s/files/1/0430/6563/9069/files/hallelujah_cohen_piano.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_off00008661.bin
ecd5453f6bcb71d2cabf2370a4d02fc03c7203a8e589362f85fded81ad920cff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8661 5144 bytes
font_01_sfnt_off000097cf.bin
e636a19463f04c98f96147ba53e3a0fc38136a40b0ef00ca898d73e99f3afe0f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x97CF 15112 bytes

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