Malicious PDF — malware analysis report

Static analysis result for SHA-256 6ac3c171dc70cd12…

MALICIOUS

PDF

47.9 KB Created: 2020-08-24 17:12:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4232b9386f0e1e6ccb6a55e1b5596da1 SHA-1: 56e1942b23a4e29bbba1d98c237a306f72a45209 SHA-256: 6ac3c171dc70cd120dc2e0a9c9f058c3e02393ae4aa87a28a9a96f556de88405
194 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to malicious infrastructure, specifically identified as a redirector. The heuristic 'SE_ADVANCE_FEE_SCAM_LURE' indicates the document's content is designed to trick users into believing they are receiving a prize or parcel, requiring them to click the link. The presence of JavaScript, though not explicitly detailed, is common in malicious PDFs for obfuscation and redirection, supporting the T1059.007 technique.

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.
  • Advance-fee lottery/parcel scam lure high SE_ADVANCE_FEE_SCAM_LURE
    Document contains lottery/beneficiary or prize language together with large-value draft/funds wording and parcel/courier delivery requirements. This is a classic advance-fee fraud document shape.
  • 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.cc/pify?keyword=k9+web+protection+browser+for+android
    • http://files.brambleithaca.com/uploads/1/3/1/3/131380786/saxisapilojasam.pdf
    • http://files.valuefund.ca/uploads/1/3/1/8/131871535/8237561.pdf
    • http://dudud.hhslmc.com/uploads/1/3/0/7/130738970/pitisiwelenisejosuzu.pdf
    • http://neboza.hammerheadfleet.com/uploads/1/3/1/1/131164250/c33787bc94ef.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0440/6041/0006/files/60156733369.pdf
    • https://cdn.shopify.com/s/files/1/0440/0028/0726/files/generative_adversarial_networks_book.pdf
    • https://cdn.shopify.com/s/files/1/0447/9402/0000/files/google_spreadsheet_count_if_not_empty.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0439/files/asco_catalog.pdf
    • https://cdn.shopify.com/s/files/1/0429/8512/8095/files/holt_modern_chemistry.pdf
    • https://cdn.shopify.com/s/files/1/0432/8351/3494/files/posadafip.pdf
    • https://cdn.shopify.com/s/files/1/0431/3127/3365/files/xugopekatafixolanos.pdf
    • https://cdn.shopify.com/s/files/1/0432/2128/7080/files/voxuxedazavamopi.pdf
    • https://cdn.shopify.com/s/files/1/0430/8969/0773/files/how_to_uninstall_virtualbox.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_off00006e71.bin
3579fcd4d7f03e6587465237bd7ab6ce9b0a59c39dbd7084ba13fb33d2a74856		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6E71 5264 bytes
font_01_sfnt_off0000806b.bin
ea20f69be180c2dbef6ef453934ef4e0fc8988996bcb13672309b41de112072a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x806B 10668 bytes
font_02_sfnt_off0000a4e0.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA4E0 4324 bytes

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