Malicious PDF — malware analysis report

Static analysis result for SHA-256 14cc76d7618f47b7…

MALICIOUS

PDF

40.8 KB Created: 2020-09-03 06:02:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e67454c8c372f5a85a9f3b3d979ca1c1 SHA-1: 91e0e042be28c8d896dad2be00263098d1d6ac3a SHA-256: 14cc76d7618f47b7f29aae323d12c61747fa5985470d62707dba5c00d39742a0
294 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1204.002 Malicious Link T1059.007 JavaScript

The PDF contains numerous links, including one pointing to a malicious redirector disguised as a TeamViewer download. It also exhibits characteristics of a recovery secret lure, suggesting an attempt to trick users into divulging sensitive information. The presence of embedded links and the lure for remote support tools indicate a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 7

  • 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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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
  • Remote-support tool lure high SE_REMOTE_SUPPORT_LURE
    Document instructs the user to install, open, or connect with a remote-support tool such as AnyDesk, TeamViewer, Quick Assist, or ScreenConnect — high-risk in an unsolicited document
  • 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.link/wix?keyword=teamviewer+8+old+version
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0470/9659/4590/files/elopement_risk_assessment_template.pdf
    • https://cdn.shopify.com/s/files/1/0434/7301/0845/files/carlos_castaneda_knjige.pdf
    • https://cdn.shopify.com/s/files/1/0435/8314/4093/files/bases_nitrogenadas_y_acidos_nucleicos.pdf
    • https://cdn.shopify.com/s/files/1/0429/1769/1559/files/ubuntu_14._04_download.pdf
    • https://cdn.shopify.com/s/files/1/0438/4564/8546/files/zogofik.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d10fabd072346dda4cf7dba52b25347.pdf
    • https://static.usrfiles.com/ugd/cb4a18_0244d6d781554d6f8a1ac8a5bd761fbd.pdf
    • https://static.usrfiles.com/ugd/4479ed_73dc236facb646b5aebac9496b0aea12.pdf
    • https://static.usrfiles.com/ugd/f14cf6_a8667e0a67504a3f899812fb5b5cf2ed.pdf
    • https://cdn.shopify.com/s/files/1/0465/3645/8399/files/56371820312.pdf
    • https://cdn.shopify.com/s/files/1/0430/9381/9541/files/sudulemukizumagadazewuno.pdf
    • https://cdn.shopify.com/s/files/1/0434/8801/8594/files/god_of_war_movie.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/mercedes_190e_manual_transmission_swap.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/koxumugude.pdf
    • https://cdn.shopify.com/s/files/1/0465/8331/6647/files/catastrophism_gradualism_uniformitarianism_volcanoes.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005ff0.bin
926400c0e68d686df0616ce3941907ac9e13d7988e99567fc1b15567868ee046		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FF0 5264 bytes
font_01_sfnt_off000071ce.bin
21812d1858df1c4972177b1d1a26481c7f51ab57bf568fd834ab7f4120ae99ff		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71CE 11200 bytes

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