Malicious PDF — malware analysis report

Static analysis result for SHA-256 7ad22ff3a27ba0e1…

MALICIOUS

PDF

38.9 KB Created: 2020-08-09 15:36:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c595438acb093a02b158dcd3fe0dbd3 SHA-1: 38b79eea798f9828c8785821f51d8e0ed5a24406 SHA-256: 7ad22ff3a27ba0e15947305fa8f9bb92abac2aaaa6a124e008fbf2e2944d7e5b
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1200 Hardware Add-in T1059.001 PowerShell T1071.001 Web Protocols

The PDF contains numerous links to external PDFs, many hosted on Shopify, suggesting a link farm or SEO manipulation tactic. One critical heuristic identified a link to a known malicious redirector, ttraff.com, which is likely the primary malicious payload delivery mechanism. The document body, though heavily obfuscated, contains references to the redirector URL and other PDF links, reinforcing the malicious redirection intent.

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.com/pify?keyword=cambridge+pet+reading+comprehension+pdf
    • http://files.flowartspace.com/uploads/1/3/0/7/130775997/begepup.pdf
    • http://files.lestatwrestling.com/uploads/1/3/1/6/131607093/xugepobi.pdf
    • http://files.tautsaimnieks.online/uploads/1/3/1/3/131383247/1d00597b.pdf
    • http://tomoloj.farmacybotanical.com/uploads/1/3/1/4/131483337/juzamubaruvo.pdf
    • http://files.tyrendarraagriculturalshow.com.au/uploads/1/3/2/7/132711970/6e7e3d840aa5.pdf
    • https://cdn.shopify.com/s/files/1/0438/6825/8469/files/vitewobovixot.pdf
    • https://cdn.shopify.com/s/files/1/0431/3966/1981/files/odisha_election_result_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/8111/3506/files/envision_math_grade_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/0428/7383/files/95989822725.pdf
    • https://cdn.shopify.com/s/files/1/0434/4460/0999/files/73572156780.pdf
    • https://cdn.shopify.com/s/files/1/0429/6163/3439/files/gegik.pdf
    • https://cdn.shopify.com/s/files/1/0434/8539/7152/files/75510461216.pdf
    • https://cdn.shopify.com/s/files/1/0428/1548/8163/files/56570098141.pdf
    • https://cdn.shopify.com/s/files/1/0431/3815/4653/files/second_conditional_exercises_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0431/6063/3504/files/24732016109.pdf
    • https://cdn.shopify.com/s/files/1/0432/4671/5040/files/anova_table_calculator.pdf
    • https://cdn.shopify.com/s/files/1/0432/1899/3307/files/bapareguridenimuraxof.pdf
    • https://cdn.shopify.com/s/files/1/0437/2211/3173/files/tijekivusugovinekebefe.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_off00004cb5.bin
ad23ccc8854a0e7971a38054e0166eb2e21773dde5bfa32e52129edaa7ab6839		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4CB5 5488 bytes
font_01_sfnt_off00005f2d.bin
c346a3f5f718e5f7fdc792b2de5af7a85771c8176c36171b25239e3de424723b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2D 9660 bytes
font_02_sfnt_off00008041.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8041 4324 bytes

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