Malicious PDF — malware analysis report

Static analysis result for SHA-256 46223cdeb00841a7…

MALICIOUS

PDF

39.9 KB Created: 2020-08-17 02:18:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d190d8a6b547268c6d887325a2b950d5 SHA-1: 53292adb43813bf2d838c88d1955167e5f7c0d02 SHA-256: 46223cdeb00841a7fdaf980e7417804dbd1f06ae2f4872ee572a996b15fa94f4
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to domains associated with redirectors or link farms, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The ML classifier also strongly flagged this PDF as malicious. The primary attack pattern appears to be SEO poisoning or a phishing lure, directing users to potentially harmful content via the embedded URLs.

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.ru/pify?keyword=will+and+going+to+worksheets+english
    • http://files.miramissions.org/uploads/1/3/0/8/130813757/5af0aa6c.pdf
    • http://files.woodstovemulledwine.com/uploads/1/3/2/7/132740515/kisetotaponido-gibiwa.pdf
    • http://files.revivalhousing.com/uploads/1/3/1/4/131407635/7339279.pdf
    • https://cdn.shopify.com/s/files/1/0428/7230/7875/files/binujadasediminufenoraxuf.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/dajumagiboliwapowirobekuw.pdf
    • https://cdn.shopify.com/s/files/1/0441/2620/8152/files/boot_flags_for_hackintosh.pdf
    • https://cdn.shopify.com/s/files/1/0434/5095/7991/files/download_bible_niv_free.pdf
    • https://cdn.shopify.com/s/files/1/0432/6188/6627/files/8591939082.pdf
    • https://cdn.shopify.com/s/files/1/0437/2951/8741/files/14509549576.pdf
    • https://cdn.shopify.com/s/files/1/0435/5863/3631/files/canara_bank_po_book.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/carnot_vapour_cycle.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/software_project_survival_guide.pdf
    • https://cdn.shopify.com/s/files/1/0432/8158/0188/files/pibemuwifodu.pdf
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/kafokabotiveridunura.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/zigulijavotiwurugaxilivir.pdf
    • https://cdn.shopify.com/s/files/1/0432/1509/3917/files/periodic_table_with_electron_configurations.pdf
    • https://cdn.shopify.com/s/files/1/0427/4031/8375/files/64205130352.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005dea.bin
e01869bd4e16dd179282d87a1515e7e50657be742505c18c2bb5ee0bdf4def7d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DEA 5256 bytes
font_01_sfnt_off00006fd4.bin
f6df35ceffb8e676f8293d4f4a2e9081ed0a419a6dab3418a790faa70aa16709		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FD4 10136 bytes

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