Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa84d784bffdb222…

MALICIOUS

PDF

58.0 KB Created: 2020-08-07 19:19:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c74b1e975fd3edc2d3bf8b04780b00bb SHA-1: 36b8c98b8d5176a8a88f7174ee91cf0a93305fa4 SHA-256: aa84d784bffdb2228463933a35e095defeb93e0400781fb1ced65ec0d8bb4238
152 Risk Score

Malware Insights

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

This PDF file contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The primary malicious URL identified is https://ttraff.ru/pify?keyword=arris+tg862+manual+pdf+espa%25C3%25B1ol, which is flagged as a malicious redirector. The document's structure suggests it is designed to manipulate search engine rankings or lure users through deceptive links, rather than deliver a direct 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=arris+tg862+manual+pdf+espa%25C3%25B1ol
    • http://files.deshaieslab.com/uploads/1/3/1/4/131483317/sesepugikovufapupa.pdf
    • http://files.jasminecwilliams.com/uploads/1/3/0/8/130814288/gizoderofalojum.pdf
    • http://files.mybowerstudio.com/uploads/1/3/0/7/130776100/waxugo-vowuzixevi-sedunon.pdf
    • http://files.abivaonlineresources.com/uploads/1/3/0/8/130813612/fa0ba13b4e.pdf
    • http://files.gt-package.com/uploads/1/3/0/7/130740323/wuvalifofunonif.pdf
    • https://cdn.shopify.com/s/files/1/0430/1737/1797/files/43217936405.pdf
    • https://cdn.shopify.com/s/files/1/0428/8030/3270/files/93249388177.pdf
    • https://cdn.shopify.com/s/files/1/0433/0491/1006/files/dunonelidekinu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8748/6358/files/regression_analysis_by_example_5th_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9456/5271/files/bajamaxuxolemitu.pdf
    • https://cdn.shopify.com/s/files/1/0432/7541/9798/files/87492683529.pdf
    • https://cdn.shopify.com/s/files/1/0427/6404/2396/files/89749234483.pdf
    • https://cdn.shopify.com/s/files/1/0434/5734/7749/files/60528754706.pdf
    • https://cdn.shopify.com/s/files/1/0427/4552/8487/files/all_important_days_in_year.pdf
    • https://cdn.shopify.com/s/files/1/0431/2816/0420/files/rowobevifikobobip.pdf
    • https://cdn.shopify.com/s/files/1/0430/4008/0023/files/discord_server_management.pdf
    • https://cdn.shopify.com/s/files/1/0438/0000/2717/files/chapter_17_physical_and_cognitive_development_in_late_adulthood.pdf
    • https://cdn.shopify.com/s/files/1/0436/2190/8640/files/82506268964.pdf
    • https://cdn.shopify.com/s/files/1/0430/7963/1001/files/nusufowaberatuforobar.pdf
    • https://cdn.shopify.com/s/files/1/0434/3644/1767/files/lubokivurujejigojenawa.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_off000092f0.bin
774c7f9100966f9d09c12511f1dc74b45296595c287b1df26abb68e38d18f6b3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x92F0 6040 bytes
font_01_sfnt_off0000a72c.bin
4800341dbbe83140c3a1931c892bd36dae7c94e9affa1121ab16e3e1952258c1		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA72C 16324 bytes

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