Malicious PDF — malware analysis report

Static analysis result for SHA-256 9e22f330f227cc7e…

MALICIOUS

PDF

44.2 KB Created: 2020-07-21 20:38:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ee72404fb6ccae3be83577724041d42b SHA-1: 37de615adca831fe9505d368d6f562f654ab7aaf SHA-256: 9e22f330f227cc7e9dd521dc8a719b4ae3834b131aaaf8e00828fa66dfefdd9f
152 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm, indicating a probable phishing or malware distribution attempt. The primary malicious URL identified is ttraff.com, which is known to host malicious redirectors. While no scripts were extracted, the sheer volume of embedded links suggests an attempt to lure users to external, potentially harmful, sites.

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/wb?keyword=pyplot%20documentation%20pdf
    • http://files.womeningovernmentservice.com/uploads/1/3/1/0/131071056/zevotosujo.pdf
    • http://files.kanzikiberafriends.org/uploads/1/3/1/4/131452876/227813.pdf
    • http://files.acornbeverage.com/uploads/1/3/0/7/130775032/kipevugi.pdf
    • http://files.nelacrosseschool.com/uploads/1/3/1/0/131070618/cc27cae.pdf
    • http://files.kanzikiberafriends.org/up
    • https://cdn.shopify.com/s/files/1/0433/9033/7189/files/pibilanurovelupipelawe.pdf
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/fupapujojojewanokirupub.pdf
    • https://cdn.shopify.com/s/files/1/0432/3786/7687/files/56442458063.pdf
    • https://cdn.shopify.com/s/files/1/0428/5959/3894/files/35065421508.pdf
    • https://cdn.shopify.com/s/files/1/0428/7404/4579/files/74721924784.pdf
    • https://mimogavotaxa.files.wordpress.com/2020/06/pujalodam.pdf
    • https://kezinoniwet.files.wordpress.com/2020/06/piperinibu.pdf
    • https://wofezezu.files.wordpress.com/2020/07/danarupejukebaditikiso.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27984898694.pdf
    • https://cdn.shopify.com/s/files/1/0429/9427/0371/files/vukefijowegufijuwajem.pdf
    • https://cdn.shopify.com/s/files/1/0433/7257/6922/files/vupupodobupux.pdf
    • https://cdn.shopify.com/s/files/1/0429/4295/5676/files/salufatujuses.pdf
    • https://cdn.shopify.com/s/files/1/0433/1690/4104/files/98963820468.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/73613113686.pdf
    • https://cdn.shopify.com/s/files/1/0431/8937/1029/files/jeluritesakibore.pdf
    • https://cdn.shopify.com/s/files/1/0440/8773/8533/files/37541517513.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_off00007059.bin
73980948ccef050a33550e9300576027b9937f32dc443a4245421c114f06ba19		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7059 5012 bytes
font_01_sfnt_off00008155.bin
9c782c2fc2053928aba1fdd6fe57bf14b09d689086b3b95ec26b3493d5f76ca7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8155 9908 bytes

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