Malicious PDF — malware analysis report

Static analysis result for SHA-256 6e2249aa3508e91e…

MALICIOUS

PDF

73.4 KB Created: 2020-07-29 13:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f19d00291ad5aa17a6253fa1f34d3c4b SHA-1: 3a7b09e8bf976e4a4fdcdf8be38eda739213d895 SHA-256: 6e2249aa3508e91ef0dc4a5393b4bc9231c2b8e9576857281373400e5d57dc9e
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, appears to be a lure related to 'shell script tutorial pdf'. The presence of numerous external links suggests an attempt to direct users to potentially harmful content or phishing 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.ru/pify?keyword=shell+script+tutorial+point+pdf
    • http://files.singingtreemidwifery.com/uploads/1/3/1/4/131407818/1902655.pdf
    • http://files.rakhmaloveandharmony.org/uploads/1/3/2/7/132740435/3962776.pdf
    • http://files.exitrealtyeastpm.com/uploads/1/3/2/8/132815365/a91155.pdf
    • http://files.northwestpetroleum.com/uploads/1/3/1/4/131453034/2688355.pdf
    • http://files.stylisharms.com/uploads/1/3/1/4/131406563/2611550.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0434/8159/6066/files/xarokalibiguxu.pdf
    • https://cdn.shopify.com/s/files/1/0435/0767/9387/files/watulizewepanukigoga.pdf
    • https://cdn.shopify.com/s/files/1/0429/1110/5191/files/32797770367.pdf
    • https://cdn.shopify.com/s/files/1/0433/7877/0076/files/vupoxowizejazenamiderod.pdf
    • https://cdn.shopify.com/s/files/1/0431/2596/4949/files/retonevulukipirivil.pdf
    • https://cdn.shopify.com/s/files/1/0434/5551/2738/files/batagejexozubuzegolefuje.pdf
    • https://cdn.shopify.com/s/files/1/0430/8277/6725/files/22857391575.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zikoraj.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53446206952.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/32823332632.pdf
    • https://cdn.shopify.com/s/files/1/0433/7447/7473/files/72024553416.pdf
    • https://cdn.shopify.com/s/files/1/0433/6500/7509/files/24127775528.pdf
    • https://cdn.shopify.com/s/files/1/0438/4410/8453/files/demesenawuboxanodo.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_off0000e009.bin
9d3057da8a337c3ebdab8d63d4cdc0875d8c9344505a829d9f0df381ebaca637		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE009 5228 bytes
font_01_sfnt_off0000f1c0.bin
47bb27566730e5a3cebdc8febf6c113f4ce4ee6660beb0aed999b4b3b4de9c13		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF1C0 11744 bytes

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