Malicious PDF — malware analysis report

Static analysis result for SHA-256 99de202eb4cb1e31…

MALICIOUS

PDF

41.5 KB Created: 2020-08-19 19:07:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 142034cbb3c74aa91efbdd9066b3c031 SHA-1: 136aa4768702e3784c0db1397b7b19d1435f9f34 SHA-256: 99de202eb4cb1e31b553069184c22677b3f906264eb305d25e13a4358f151a66
194 Risk Score

Malware Insights

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

The PDF file exhibits characteristics of a link farm, with numerous embedded URLs. One of these URLs, 'https://ttraff.ru/pify?keyword=android+games+with+bluetooth+keyboard+support', is identified as a malicious redirector. The document body contains garbled text but also includes the same malicious URL, suggesting an attempt to lure users to a harmful site. The presence of a large number of external links, many hosted on Shopify, further supports the link farm classification.

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=android+games+with+bluetooth+keyboard+support In PDF document text
    • http://kivedi.penrithicepalace.com/uploads/1/3/1/3/131398097/xotuvaxezaxazaw-sitiloxo-nurige.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/1/0438/1065/2317/files/gujipilidajapap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/45560821546.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/2554/1789/files/fekazisojug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7514/0761/files/maxon_cinema_4d_r20_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9743/8875/files/korean_basic_language_in_nepali.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/fokuxakalokatutadixamesev.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5274/5375/files/21600722228.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9825/8088/files/biblia_cristiana_de_estudio.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6926/7354/files/58044375023.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8565/8280/files/10923953063.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4764/1510/files/xuwakuvobiwokobija.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1570/8577/files/72394476336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6171/3813/files/65480420189.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

Related samples 1

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

Full JSON: related samples API

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006181.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6181 5760 bytes
SHA-256: 3295143f6ace3786f5326ec53c395e8f83842ef77e005c8b8b7d18e06596c2fc
font_01_sfnt_off00007501.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7501 10520 bytes
SHA-256: 68279b911f001bfa146b8079c3858b3f4a7ada9ddd745df00aed089b788d5de0

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