Malicious PDF — malware analysis report

Static analysis result for SHA-256 d38330a5d07fb467…

MALICIOUS

PDF

39.5 KB Created: 2020-08-19 23:11:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e531a471f38ec86f7663a72ac878b48a SHA-1: fd770a8a506c428d299ad07c39c0804fd28c2936 SHA-256: d38330a5d07fb467d7ac70ba6f34ed153e2be4832648a9be86aea93f1839b814
154 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL pointing to a redirector service. This suggests the document's primary purpose is to redirect users to malicious sites, likely for further exploitation or phishing. No scripts were extracted, limiting the analysis of specific payload delivery mechanisms.

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=microsoft+family+tree+maker+template
    • http://zikuw.coolkingindia.com/uploads/1/3/1/4/131453133/3c7be76d03.pdf
    • http://files.artbylauranicole.com/uploads/1/3/1/0/131070588/7648793.pdf
    • https://cdn.shopify.com/s/files/1/0440/5107/1126/files/runescape_aviansies_guide.pdf
    • https://cdn.shopify.com/s/files/1/0427/6997/3415/files/45867231438.pdf
    • https://cdn.shopify.com/s/files/1/0435/3576/1576/files/sort_tuple_python.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62654677968.pdf
    • https://cdn.shopify.com/s/files/1/0430/9513/0266/files/example_of_mood_in_literature.pdf
    • https://cdn.shopify.com/s/files/1/0445/9456/1188/files/waste_to_energy_sweden.pdf
    • https://cdn.shopify.com/s/files/1/0431/5794/6519/files/59200991040.pdf
    • https://cdn.shopify.com/s/files/1/0431/3759/7596/files/maloviwedusava.pdf
    • https://cdn.shopify.com/s/files/1/0429/9682/6261/files/89821469182.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_off00005dcc.bin
bccd0425503fe9f500bad611f6da675b42449dbfc6aabdbccc63d48f568b988b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5DCC 5332 bytes
font_01_sfnt_off00006fe6.bin
5b36e404e527e9b911c2cd57380b239c5b0117ce79845425d5f61b778a3394eb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6FE6 9864 bytes

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