Malicious PDF — malware analysis report

Static analysis result for SHA-256 097d3133b68bfb1a…

MALICIOUS

PDF

61.0 KB Created: 2020-08-07 01:41:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3fda7bcc89a441b7427eee9ca636fc00 SHA-1: 5b3b4f040cff3495a180247d8c479ae58f57b670 SHA-256: 097d3133b68bfb1a3441fdf6f09d2fc1a1facb9a3a9b14901f41b98a0d63d01c
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary malicious URL identified is a redirector that appears to be part of a link farm designed to distribute malicious content. The ML classifier also strongly indicated maliciousness.

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=the+best+wife+true+love+story+pdf+read+online
    • http://files.egfoley.com/uploads/1/3/1/4/131453348/kitozazufu_wipixifa_wonud_fawabar.pdf
    • http://files.pineridgewaterdistrict.com/uploads/1/3/0/7/130776272/7225819.pdf
    • http://files.palmsandholley.com/uploads/1/3/1/3/131380345/e2d86759ed3.pdf
    • http://files.roundstoneponyshow.com/uploads/1/3/1/4/131406258/ada829b38.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/2008/2590/files/muwezejixekugixiwurure.pdf
    • https://cdn.shopify.com/s/files/1/0437/1267/5990/files/45124867935.pdf
    • https://cdn.shopify.com/s/files/1/0431/4929/5776/files/38930391275.pdf
    • https://cdn.shopify.com/s/files/1/0427/8406/3654/files/wedemawowadonemawirile.pdf
    • https://cdn.shopify.com/s/files/1/0431/9353/2573/files/aleluia_cohen_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8861538602.pdf
    • https://cdn.shopify.com/s/files/1/0431/6053/5196/files/66144986248.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/52325197595.pdf
    • https://cdn.shopify.com/s/files/1/0434/3798/1852/files/dazobufiwuxat.pdf
    • https://cdn.shopify.com/s/files/1/0429/0261/8278/files/country_code_36.pdf
    • https://cdn.shopify.com/s/files/1/0436/7230/5817/files/42173126576.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72890356131.pdf
    • https://cdn.shopify.com/s/files/1/0431/5670/1348/files/83309143456.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_off0000963a.bin
124eb601f28e034ece03dbd115d5c04098eb12fb1a35156ebce0e9a9474805a7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x963A 5472 bytes
font_01_sfnt_off0000a8e2.bin
333617a3dd1ee71f607a4b8a0a68a7d8f538c1376b42b673ebe185ea08c0eea3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA8E2 10872 bytes
font_02_sfnt_off0000ce17.bin
1ec174ff3375995b5d33c178ddbae9cdca6482ac0d6d3aa7d1f72e06915f7824		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCE17 16720 bytes

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