Malicious PDF — malware analysis report

Static analysis result for SHA-256 d65c85b645724b12…

MALICIOUS

PDF

61.4 KB Created: 2020-08-02 05:51:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c245f7d2aab4c377db6b80a7077871ab SHA-1: 7950dab7a168f328adc5da0d43bf44fe2a9f8b8d SHA-256: d65c85b645724b1219467d8a68414529bddb848c99a26658da616691c57914b9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector at 'https://ttraff.ru/pify?keyword=remove+punctuation+python+3'. Another heuristic indicates a large link farm, suggesting an attempt to manipulate search engine results or distribute content. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same URL as the malicious redirector, reinforcing its role in the attack.

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=remove+punctuation+python+3 In PDF document text
    • http://files.nature-recharge-botanicals.com/uploads/1/3/2/6/132683087/1950813.pdfIn PDF document text
    • http://files.nwtmta.org/uploads/1/3/1/1/131164446/bubupidipexikepo.pdfIn PDF document text
    • http://files.midamericaairmuseum.org/uploads/1/3/1/6/131607805/63c050915.pdfIn PDF document text
    • http://files.elisemitchellcoaching.com/uploads/1/3/1/4/131437689/ziwizijejixaz.pdfIn PDF document text
    • http://files.dallasmoderne.com/uploads/1/3/1/6/131606360/reputiranisemapo.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/1/0434/2821/6983/files/php_video_stream.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/jufonorupozakevam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0145/4500/files/kufabolakedugexugulazar.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9324/5590/files/jobide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7301/0840/files/kiwidapemurapiwolonivug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2250/0518/files/67231537064.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3220/4696/files/90316018790.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2752/1948/files/92161815458.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3545/7698/files/vasiwijejuvenin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2465/4241/files/ford_535_backhoe_manual.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 8

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_off000084bb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x84BB 9244 bytes
SHA-256: e84618c6015f888ca346cb6f5f6e1111e2d7d6fbf4c70a6d6edb1b01bebbe72c
font_01_sfnt_off0000a36e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA36E 5200 bytes
SHA-256: 5b459c9bd61883d36b2a8fb3615d9e61672a67ef361eebf224572b6dcc1ad05d
font_02_sfnt_off0000b518.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB518 16428 bytes
SHA-256: e3a53893df1aa2eae98fb17c3e7c6ba65779768ef178a2864227e1d610b367f8

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