Malicious PDF — malware analysis report

Static analysis result for SHA-256 73bf6bb14b002b3a…

MALICIOUS

PDF

52.6 KB Created: 2020-08-21 12:59:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e9a29665c5b6a50899ceca8996fd19fc SHA-1: 85cfff38544b946194ebc945bc20938cee7019c5 SHA-256: 73bf6bb14b002b3a83060044905f791338097774330fe7ec957b84eaf99ee9eb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains heuristics indicating it's a malicious redirector and part of an advance-fee scam, luring users with fake tax reform information. The embedded link `https://ttraff.cc/pify?keyword=netherlands+2019+tax+reform` is identified as a malicious redirector. The document body, though heavily obfuscated, contains this URL and other links to Shopify, suggesting a link farm tactic to distribute malicious content.

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=netherlands+2019+tax+reform
    • http://jidumofob.centerforpilates.com/uploads/1/3/2/6/132682137/6833734.pdf
    • http://risaga.lescheneauxartisancoop.com/uploads/1/3/2/8/132815367/dibuwukiwa.pdf
    • http://tinabuful.nickydelariva.com/uploads/1/3/0/9/130969260/mudub.pdf
    • http://files.acamusic.org/uploads/1/3/0/7/130775393/jidiv_fapokij_tujawa_guwikivineje.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0429/5406/4028/files/31219065195.pdf
    • https://cdn.shopify.com/s/files/1/0429/3722/1276/files/diwolilirososo.pdf
    • https://cdn.shopify.com/s/files/1/0433/1431/5422/files/putin.pdf
    • https://cdn.shopify.com/s/files/1/0440/0594/9590/files/mathematics_in_the_modern_world_college_book.pdf
    • https://cdn.shopify.com/s/files/1/0428/8898/6783/files/winudonexine.pdf
    • https://cdn.shopify.com/s/files/1/0435/5509/4677/files/97394188270.pdf
    • https://cdn.shopify.com/s/files/1/0440/0149/3142/files/functional_anatomy_of_kidney.pdf
    • https://cdn.shopify.com/s/files/1/0433/8096/5534/files/archive_magazine_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0433/3902/2485/files/75957478186.pdf
    • https://cdn.shopify.com/s/files/1/0430/8962/5250/files/18651461763.pdf
    • https://cdn.shopify.com/s/files/1/0436/4691/0617/files/zetoxirutobujegosafebades.pdf
    • https://cdn.shopify.com/s/files/1/0431/9569/5267/files/58176736067.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000900a.bin
8099eab3a123dfe296915897fd3c75ae291e896045045b3519f09dae55958556		 pdf-font-stream PDF embedded font (sfnt) at offset 0x900A 5664 bytes
font_01_sfnt_off0000a328.bin
1dadb45c9bf3f5871b65f59efee1805c1d028aa8a436c48911c3dcdf6f8a7127		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA328 10096 bytes

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