Malicious PDF — malware analysis report

Static analysis result for SHA-256 6a22225d3416b73b…

MALICIOUS

PDF

43.3 KB Created: 2020-08-17 14:57:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e13a913898f64b3de08f28ebfe99c89d SHA-1: 6105a36fbc482811528a1646a3e1349d6ccb40fb SHA-256: 6a22225d3416b73bc05625067bf07067e04e41956708135c4a7d5da94ba572b3
242 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating malicious intent, including a link to a known malicious redirector and a large number of external PDF links, suggesting a link farm for SEO manipulation or malware distribution. The document also contains instructions to disable security software and mentions password protection, common tactics for evading detection. The primary malicious URL identified is https://ttraff.com/pify?keyword=windows+7+crack+chew-+wga.

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.
  • Security software disable instruction high SE_SECURITY_BYPASS
    Document instructs the user to disable antivirus or security software — unusual for ordinary documents and high-risk in an unsolicited file
  • 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
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.com/pify?keyword=windows+7+crack+chew-+wga
    • http://files.louiseriley.com/uploads/1/3/2/7/132740723/34162d.pdf
    • http://totiduwo.thejugglingscientist.com/uploads/1/3/1/3/131398140/jixewebul-wetep.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • https://cdn.shopify.com/s/files/1/0434/1825/5510/files/ffxiv_server_transfer_cost.pdf
    • https://cdn.shopify.com/s/files/1/0439/0669/5320/files/bixuw.pdf
    • https://cdn.shopify.com/s/files/1/0435/3936/6047/files/2541805471.pdf
    • https://cdn.shopify.com/s/files/1/0432/1371/7662/files/10381561635.pdf
    • https://cdn.shopify.com/s/files/1/0440/0631/0046/files/6283873598.pdf
    • https://cdn.shopify.com/s/files/1/0434/3444/2919/files/lagu_sendiri_lagi_chrisye.pdf
    • https://cdn.shopify.com/s/files/1/0432/3685/1874/files/jorotodurufarinonafu.pdf
    • https://cdn.shopify.com/s/files/1/0431/0273/2448/files/58263806394.pdf
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/general_chemistry_atomic_structure.pdf
    • https://cdn.shopify.com/s/files/1/0433/8266/9464/files/voxijenenoviwemebarowu.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_off00005d5a.bin
8c8e956b6c8728ed8c938f5e4feb93dbdba34739f48f8ee6a14d2553cd1d7f68		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5D5A 5160 bytes
font_01_sfnt_off00006ef0.bin
a8719ceabd26fab461bf8fd41ff2ae1b57930acde7a0489a44a8f69cb51bf450		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6EF0 10472 bytes
font_02_sfnt_off0000928c.bin
1158d95dac44631f497756703988ba3645251422e7ff0015d3fca430225e7c3e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x928C 4324 bytes

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