Malicious PDF — malware analysis report

Static analysis result for SHA-256 3c098acaad699d22…

MALICIOUS

PDF

44.9 KB Created: 2020-08-06 23:52:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f405aff12d65a3e51ed309451230e62d SHA-1: 223f3d7bcf1dda3dcd4adeec2dd8305bcaba72c8 SHA-256: 3c098acaad699d22d88187ffa617573d168eec4883166bf0de0f82cac625587f
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to the Paris Agreement and the wkhtmltopdf tool, suggesting a lure to trick users into clicking the malicious link. The ML classifier strongly indicated maliciousness.

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.cc/pify?keyword=acuerdo+de+paris+sobre+cambio+climatico+pdf
    • http://files.wardlawspoultryfarm.com/uploads/1/3/1/1/131164009/mivika-muzos-wokujonasenasi.pdf
    • http://files.lsten.net/uploads/1/3/1/4/131406735/wifoja.pdf
    • http://files.phazetheory.com/uploads/1/3/1/4/131454109/70fb882e3.pdf
    • http://nakowap.cruisediamondhead.com/uploads/1/3/2/7/132740405/zedamumalupete.pdf
    • https://cdn.shopify.com/s/files/1/0429/4252/9695/files/17559801750.pdf
    • https://cdn.shopify.com/s/files/1/0428/2381/1239/files/22469273175.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/geligup.pdf
    • https://cdn.shopify.com/s/files/1/0434/5446/4165/files/xumeve.pdf
    • https://cdn.shopify.com/s/files/1/0433/8230/9029/files/ponatuvememeg.pdf
    • https://cdn.shopify.com/s/files/1/0429/9502/4023/files/mowutoleteperinev.pdf
    • https://cdn.shopify.com/s/files/1/0439/2642/1672/files/star_wars_gameboy.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/mindray_hematology_analyzer.pdf
    • https://cdn.shopify.com/s/files/1/0432/0608/2717/files/legadesonagired.pdf
    • https://cdn.shopify.com/s/files/1/0431/1616/7328/files/wav_to_mid_convertor.pdf
    • https://cdn.shopify.com/s/files/1/0437/7686/8510/files/sahih_bukhari_sharif_urdu_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/3217/5014/files/fefepakarukome.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006199.bin
85c2e9a4f3898cf5b091dc3fb5b9ac133c1d07d9dc38f77796649c7ca2ec847d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6199 5208 bytes
font_01_sfnt_off00007343.bin
ba005479fafb1e209ca908906e892c6709ff1485f3fb9de42917402e8332c428		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7343 10840 bytes
font_02_sfnt_off00009665.bin
4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9665 4324 bytes

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