Malicious PDF — malware analysis report

Static analysis result for SHA-256 48c7b30078c485be…

MALICIOUS

PDF

40.1 KB Created: 2020-08-08 00:20:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e475700fb6b290c848e766cb69fcf564 SHA-1: 741718273c1d10dc501d0378104afaab3b7536b6 SHA-256: 48c7b30078c485be8c273c26fdf42cbd986e17068844c0149d8991c090795beb
154 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with the primary link leading to a redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=payroll+accounting+journal+entries+pdf', which is a known malicious redirector. This suggests the document's purpose is to redirect the user to malicious content, likely for phishing or malware distribution. No scripts were extracted, limiting further analysis of the payload.

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=payroll+accounting+journal+entries+pdf
    • http://files.flamingwoodwinds.com/uploads/1/3/1/8/131871569/kagisofosob-jadojun-dapix.pdf
    • http://files.carlosgraysantana.com/uploads/1/3/0/7/130775387/sipozuleviwusibir.pdf
    • http://files.patrickinpanama.co.uk/uploads/1/3/1/3/131383860/4cfba23549ae.pdf
    • https://cdn.shopify.com/s/files/1/0439/1793/4747/files/the_dark_lemony_snicket.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pazobezosajage.pdf
    • https://cdn.shopify.com/s/files/1/0431/1446/3394/files/31432388079.pdf
    • https://cdn.shopify.com/s/files/1/0428/2266/4348/files/8598606833.pdf
    • https://cdn.shopify.com/s/files/1/0431/5689/7947/files/58201238584.pdf
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/88476640023.pdf
    • https://cdn.shopify.com/s/files/1/0431/9812/0094/files/xituzuxoruj.pdf
    • https://cdn.shopify.com/s/files/1/0437/3990/6209/files/93508342909.pdf
    • https://cdn.shopify.com/s/files/1/0430/8510/3255/files/javeziribama.pdf
    • https://cdn.shopify.com/s/files/1/0430/6105/1546/files/eager_beaver_chainsaw.pdf
    • https://cdn.shopify.com/s/files/1/0431/3802/3581/files/betenowarebazubaraweg.pdf
    • https://cdn.shopify.com/s/files/1/0427/9628/6119/files/information_technology_business_management.pdf
    • https://cdn.shopify.com/s/files/1/0435/0679/4651/files/tapaxof.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_off00005e53.bin
8b1ecfe239975b9d1c792acb05b6faa970ecdbc8b8be1f3dea13154db1a11cec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E53 5500 bytes
font_01_sfnt_off0000712a.bin
ff9f0a29ce73c9149f5b7fd3487d37ab180d8f1a4a1ae49a0f50c87ea1508a13		 pdf-font-stream PDF embedded font (sfnt) at offset 0x712A 10040 bytes

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