Malicious PDF — malware analysis report

Static analysis result for SHA-256 009d0b770a81c9c1…

MALICIOUS

PDF

53.5 KB Created: 2020-07-31 13:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9190aef8c5bb05840c753823ae91a178 SHA-1: a25f5a85c7b28061717e06816c9ecea0d0b0fcad SHA-256: 009d0b770a81c9c109ad112b0a4596e0767376abdc5c725c1f6d3bf28f6d57c2
154 Risk Score

Malware Insights

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

The PDF document contains numerous embedded links, with one specifically pointing to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated, but the presence of a malicious redirector suggests a phishing or malware delivery attempt.

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.cc/pify?keyword=que+es+superficie+corporal+pdf
    • http://files.londonstreetgallery.org/uploads/1/3/0/7/130739039/lixujivusawa-daxeveji.pdf
    • http://files.inspiredancecentre.com/uploads/1/3/1/4/131437615/478988.pdf
    • http://files.thecleanandsimplelife.com/uploads/1/3/0/7/130739202/jobuvarazis.pdf
    • http://files.kathmiddletonbooks.com/uploads/1/3/1/4/131437041/fikazasiza.pdf
    • http://files.mysaddlefitter.net/uploads/1/3/1/4/131409200/8e027789.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0435/4120/1064/files/51431764669.pdf
    • https://cdn.shopify.com/s/files/1/0433/6245/1611/files/94665020407.pdf
    • https://cdn.shopify.com/s/files/1/0434/5783/9254/files/44851043593.pdf
    • https://cdn.shopify.com/s/files/1/0430/6118/2617/files/76179740818.pdf
    • https://cdn.shopify.com/s/files/1/0428/9354/1532/files/rugakanirodojawate.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1764/files/40168653563.pdf
    • https://cdn.shopify.com/s/files/1/0431/0417/4233/files/ruremijotasegubudide.pdf
    • https://cdn.shopify.com/s/files/1/0431/5188/4445/files/remulasoxevoredekebefofi.pdf
    • https://cdn.shopify.com/s/files/1/0434/2782/3778/files/52972849503.pdf
    • https://cdn.shopify.com/s/files/1/0440/0611/3430/files/84366893192.pdf
    • https://cdn.shopify.com/s/files/1/0432/5366/1864/files/lojinefukupope.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/52325930971.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
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007a9f.bin
eceaa248c43c63154d1456f9dc079f196f52d17d858839cfbc189b6e79b4b4ad		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A9F 4904 bytes
font_01_sfnt_off00008b5d.bin
62fc9e9aac69af7caae409ebfdcf8ca1f983a52c91312f3f64b52768618d6d65		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8B5D 11728 bytes
font_02_sfnt_off0000b1f9.bin
35d3440dae1ebc896564e4e6f70ea95aa3a30a1ac603c7fffbb21b68b8b72e2f		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB1F9 16036 bytes

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