Malicious PDF — malware analysis report

Static analysis result for SHA-256 71ca929f71f63b33…

MALICIOUS

PDF

74.5 KB Created: 2020-08-31 13:23:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9456d5f15240858d538b9e9de5186de7 SHA-1: 142b765f249bcd331bba4fa3f76a2423edd4db9b SHA-256: 71ca929f71f63b3340bf59dbf252e04890a8170bc5c968980faf6024c434d877
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains a link to a known malicious redirector, ttraff.ru, which is likely used to distribute malware or lead users to phishing sites. The document body, though heavily obfuscated, contains the same URL and appears to be a lure related to 'animal crossing gamecube cheats'. The presence of numerous embedded links, many pointing to Shopify domains hosting other PDFs, suggests a link farm or SEO poisoning tactic to increase visibility and traffic to the malicious redirector. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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.ru/wix?keyword=animal+crossing+gamecube+cheats
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/1660/1249/files/zajifugexolapeg.pdf
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/62832984998.pdf
    • https://cdn.shopify.com/s/files/1/0430/8847/8365/files/23624969149.pdf
    • https://cdn.shopify.com/s/files/1/0432/3164/1762/files/sekelosadagipu.pdf
    • https://cdn.shopify.com/s/files/1/0430/6701/5322/files/6689324597.pdf
    • https://cdn.shopify.com/s/files/1/0431/1754/3588/files/balada_de_amor_ao_vento.pdf
    • https://cdn.shopify.com/s/files/1/0460/0122/5895/files/lighting_for_digital_photography_from_snapshots_to_great_shots.pdf
    • https://cdn.shopify.com/s/files/1/0433/4619/8683/files/almost_single_advaita_kala.pdf
    • https://cdn.shopify.com/s/files/1/0432/5697/1432/files/4836446292.pdf
    • https://cdn.shopify.com/s/files/1/0428/8148/2919/files/basketball_half_court_diagram_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/4272/5275/files/2329306662.pdf
    • https://cdn.shopify.com/s/files/1/0430/1275/1523/files/android_emulator_for_linux_ubuntu.pdf
    • https://cdn.shopify.com/s/files/1/0436/9186/8313/files/analog_clock_for_windows_10_desktop.pdf
    • https://cdn.shopify.com/s/files/1/0428/3318/2886/files/guide_for_cadillacs_and_dinosaurs.pdf
    • https://cdn.shopify.com/s/files/1/0434/8595/4208/files/dufos.pdf
    • https://cdn.shopify.com/s/files/1/0429/6019/1641/files/75149822947.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000c9dd.bin
2f1d776e0fe047f8a05801f0b921ebd079cbcd6ea8c67c07f46a48603b95857d		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC9DD 3908 bytes
font_01_sfnt_off0000d7c5.bin
885ae5a6941270ad2998d4bda1d14800f69ca5b4f006ee35a101a04e1fbbc5f6		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD7C5 5340 bytes
font_02_sfnt_off0000e9bc.bin
0ff9da2410f234b8e19edb5240e997cc5745db51b418122a2619c8509539d9e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE9BC 16236 bytes

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