Malicious PDF — malware analysis report

Static analysis result for SHA-256 5419d90549ae65a9…

MALICIOUS

PDF

42.2 KB Created: 2020-08-03 12:15:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 992e5c20bbc094bad09e02d6d4f6925a SHA-1: 2d47a994b66149aff73fbab5b12c7d3c0a97cd34 SHA-256: 5419d90549ae65a94e146ed5c72f996f80795ff23c82cff691e303002903c6db
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains numerous links, including one to a known malicious redirector, ttraff.ru. The document body, though heavily obfuscated, contains text related to converting PDFs and references to wkhtmltopdf, suggesting a lure to trick users into clicking the malicious link. The ML classifier also strongly indicated maliciousness. The primary attack vector appears to be directing users to malicious infrastructure via a deceptive link.

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=convert+scanned+pdf+to+word+free+software In PDF document text
    • http://files.atticplayers.com/uploads/1/3/0/8/130873804/1834913.pdfIn PDF document text
    • http://files.roxstardance.com/uploads/1/3/1/4/131412426/a78532c782085.pdfIn PDF document text
    • http://files.en.skydivevoss.no/uploads/1/3/1/0/131069763/e0c924ced34d26d.pdfIn PDF document text
    • http://files.rehobothchildrenstheatre.org/uploads/1/3/1/4/131437005/8573961c659c3.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/1/0435/4323/2661/files/youtube_on_repeat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5627/5362/files/weduribusosuvigosi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3573/7755/files/avl_tree_java.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7490/2423/files/93159295409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/3752/2080/files/pabovomixovogasebo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7241/4106/files/wegerosa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/4038931890.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/8282/3320/files/tp_link_tl-_wn722n_driver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4826/4089/files/wixijitejumumiw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2826/6654/files/42337494398.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8548/6485/files/wufetaduxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/lirodib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.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
🗂 Part of campaign: skydivevoss.no 5 samples

Related samples 8

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_off00006878.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6878 5176 bytes
SHA-256: 2394885996a1dbdcfadd9b414f5dffcb76efc902a70093e52a6f80ecd743fc0b
font_01_sfnt_off00007a35.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7A35 9768 bytes
SHA-256: bb89e53d3c07be8ddaca0c9373543bc823545a98edff2c7adf17c1da4ce27661

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