Malicious PDF — malware analysis report

Static analysis result for SHA-256 038af522ae8ad3c4…

MALICIOUS

PDF

59.0 KB Created: 2020-08-18 14:09:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 74f9a034a430b66d831370be9e4c2f8c SHA-1: e531f425b947d858869010b6a348c09c924b88b9 SHA-256: 038af522ae8ad3c40a842cc48aa2d923d734ca3461e8e51497ed47af1351d9d0
154 Risk Score

Malware Insights

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

The PDF document contains a large number of external links, many of which are SEO-optimized and point to PDF files hosted on Shopify. One of the embedded URLs, 'https://ttraff.ru/pify?keyword=cisco+sg350-+28mp+datasheet', is flagged as a known malicious redirector. The document body, though partially corrupted, includes references to the Cisco product and the authoring application, suggesting a lure to disguise the malicious link farm.

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=cisco+sg350-+28mp+datasheet
    • http://fobidos.noccassoc.org/uploads/1/3/0/9/130969280/5a5ece43d030.pdf
    • http://files.nickynoodlesdoodles.co.uk/uploads/1/3/0/7/130775830/laxemixugazisupole.pdf
    • http://files.imaginationplayhousesf.com/uploads/1/3/1/0/131071037/zeduj.pdf
    • http://files.misssuesfuturescholar.com/uploads/1/3/1/1/131164479/xawixozodubora.pdf
    • http://files.mywhiteengineering.com/uploads/1/3/2/6/132681863/mikofivut.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0434/9096/7714/files/bezijaguzeva.pdf
    • https://cdn.shopify.com/s/files/1/0431/4441/3341/files/bestiary_4.pdf
    • https://cdn.shopify.com/s/files/1/0434/3565/5335/files/apple_company_balance_sheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/1564/3031/files/44382953783.pdf
    • https://cdn.shopify.com/s/files/1/0434/5475/9069/files/71306923790.pdf
    • https://cdn.shopify.com/s/files/1/0431/4890/2554/files/67325840248.pdf
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/28998518717.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/jaxigosileworu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8358/6977/files/loxegarasifogobezim.pdf
    • https://cdn.shopify.com/s/files/1/0436/6126/3001/files/los_4_acuerdos.pdf
    • https://cdn.shopify.com/s/files/1/0430/7750/1079/files/brillouin_zone.pdf
    • https://cdn.shopify.com/s/files/1/0437/7785/1550/files/2d_shapes_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0430/6065/8333/files/slavery_and_slave_trade_in_africa.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/80804151078.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000702e.bin
725c64097f56e66cce3aefd6e9e5cf880ea4392699bc13cc9297334db253d6aa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702E 6052 bytes
font_01_sfnt_off00008498.bin
ffc2e7df17811494d1257eb4c65e068b3e250bc1f589a682f731b469cff8c740		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8498 9320 bytes
font_02_sfnt_off00009e8e.bin
1685fc5900c58e6f1336133d174ec7326a8250cb296e71294f9c867013567d94		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E8E 13448 bytes
font_03_sfnt_off0000c96a.bin
5b0d2701ab39d2f69c66d7d16c60d8db0b323aa0832947137e757b5401d27330		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC96A 16060 bytes

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