Malicious PDF — malware analysis report

Static analysis result for SHA-256 f5866f95bca53d81…

MALICIOUS

PDF

58.8 KB Created: 2020-08-08 02:55:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3285d4df23142530cd3250915038e821 SHA-1: 44139f20840442da207496819686d3b95c026078 SHA-256: f5866f95bca53d81260788c6ae276a46299b55fc97682684bc30a17a5d5e9285
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF file was identified as malicious due to its inclusion of a redirector link pointing to a known malicious infrastructure. It also features a large number of external links, characteristic of a link farm, with the primary redirect URL being https://ttraff.cc/pify?keyword=artikel+tentang+bahaya+narkoba+pdf. The document body, though heavily obfuscated, contains this same URL, suggesting a lure to entice users to click on malicious links.

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=artikel+tentang+bahaya+narkoba+pdf
    • http://files.wongyuhao.com/uploads/1/3/0/8/130814101/vezupat.pdf
    • http://tatusop.thecarolinacanineranch.com/uploads/1/3/1/4/131483281/netuf-jijapikofep-vipefijulegit.pdf
    • http://xutenov.pieceokake.org/uploads/1/3/2/6/132681946/gasemefek.pdf
    • http://files.topophotography.com/uploads/1/3/0/7/130775331/9942101.pdf
    • http://files.andfairphotography.com/uploads/1/3/0/8/130874284/db4f4ce83fe.pdf
    • http://files.wongyuhao.com/uploads/1/3/0/8/130814101
    • https://cdn.shopify.com/s/files/1/0429/3427/2159/files/70783609599.pdf
    • https://cdn.shopify.com/s/files/1/0432/4176/7072/files/kuxuvedenuzuresunezuz.pdf
    • https://cdn.shopify.com/s/files/1/0437/9112/2584/files/dapeliwalikijizafoze.pdf
    • https://cdn.shopify.com/s/files/1/0431/6535/2093/files/59336484488.pdf
    • https://cdn.shopify.com/s/files/1/0440/8262/6710/files/zifugerezojejelepapovo.pdf
    • https://cdn.shopify.com/s/files/1/0431/8032/7070/files/25698619220.pdf
    • https://cdn.shopify.com/s/files/1/0439/3952/8872/files/lignin_degradation.pdf
    • https://cdn.shopify.com/s/files/1/0435/2131/0880/files/manual_de_cooperativismo_y_economia_solidaria.pdf
    • https://cdn.shopify.com/s/files/1/0432/7764/8027/files/rusinulapitij.pdf
    • https://cdn.shopify.com/s/files/1/0428/5467/8687/files/24392522260.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_off00009b65.bin
195751e2a498a3b8f8d6ab99ece29f5cdfa6079601b399b49e9427e662c880fd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B65 5208 bytes
font_01_sfnt_off0000ad0d.bin
018017bf64b6da148bd14ec6e55c32b1ff87cb6255e27ae4443d969a0f59c23e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAD0D 10092 bytes
font_02_sfnt_off0000cf89.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCF89 4324 bytes

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