Malicious PDF — malware analysis report

Static analysis result for SHA-256 5f03cc81444bc49a…

MALICIOUS

PDF

50.1 KB Created: 2020-08-22 13:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97d88e8c0a29117b25ee8310fdd34c28 SHA-1: 91f9cdfcdca82797741d065891da655edee0518f SHA-256: 5f03cc81444bc49a64f060eec65c7d61b81887a27a83353f88b44e06e99212e6
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many of which point to a redirector service (ttraff.ru) that is known to host malicious content. The document body, though heavily obfuscated, contains the same lure text and URL found in the heuristics, suggesting an attempt to trick users into downloading potentially harmful files. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Image lure linking to an SEO redirector (free-download phishing) high PDF_SEO_UTM_REDIRECTOR_LINK
    PDF embeds an image with little or no body text and a clickable link to a multi-word utm_term / FeedBurner-proxied SEO redirector — the 'free ebook / solution-manual / document download' phishing family that ranks for natural-language search queries and routes the user into a payload/redirect chain. The PDF carries no exploit; the risk is the linked destination. Flagged structurally (image lure + SEO redirector) so it does not depend on a ClamAV/ML signature, and regardless of how many filler text pages the lure carries.
  • 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=sorting+algorithms+cheat+sheet+java In PDF document text
    • http://ralurusi.mentalhealthjunkie.com/uploads/1/3/0/7/130775940/1767525.pdfIn PDF document text
    • http://files.afmxschool.com/uploads/1/3/1/8/131871705/burujosegir.pdfIn PDF document text
    • http://files.globalevangelisticministries.net/uploads/1/3/2/3/132302759/7891151.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4093/0968/files/33330524387.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4189/0210/files/pdf_split_to_jpg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0108/5082/files/20653488404.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8927/8616/files/automatic_transmission_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8312/7201/files/tunnelbear_vpn_apk_old_version.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6682/6656/files/batinanidoxixiwerijiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2421/0326/files/16720541674.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2795/4853/files/42093746484.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3976/9254/files/65861856959.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1781/9544/files/shin_chan_tamil_video_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5074/5512/files/xotajepened.pdfIn PDF document text
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#In PDF document text
    • http://purl.org/dc/elements/1.1/In PDF document text
    • http://ns.adobe.com/pdf/1.3/In PDF document text
    • http://ns.adobe.com/xap/1.0/In PDF document text
    • http://ns.adobe.com/xap/1.0/mm/In PDF document text
    • http://ns.adobe.com/xap/1.0/rights/In PDF document text
    • http://scripts.sil.org/OFLIn PDF document text
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Related samples 3

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000606c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x606C 5452 bytes
SHA-256: f77db264eefb1d7e41beb0e79cf1fc29ba3038d511e379f69639a2c0431bc74f
font_01_sfnt_off000072cd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72CD 16576 bytes
SHA-256: e90cd73e89e7f7007060bf2717022da3c08fa6fca62a144535cd2b5f3cdb57cb
font_02_sfnt_off0000a513.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA513 16500 bytes
SHA-256: b363c4eac1e556b805637b4049b39081308579f78cdac206795c65238dc9a932

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