Malicious PDF — malware analysis report

Static analysis result for SHA-256 70ba8066b89dc5ee…

MALICIOUS

PDF

40.3 KB Created: 2020-08-20 23:03:56 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8e04329a129e2c61b8dda31338910ea6 SHA-1: 53107430ebf556f95b1c4ab2534525a5e4eaef6f SHA-256: 70ba8066b89dc5ee1855e9be6a4a02ee16cef0b3997e0cc5c953ca6e5f67026e
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, many pointing to redirector infrastructure like 'ttraff.ru', which is flagged as malicious. The document body, though obfuscated, contains text suggesting it's a worksheet, a common lure for phishing or malware delivery. The ML classifier strongly indicates maliciousness, and the presence of multiple SEO-optimized PDF links suggests a link farm used for distributing malicious content.

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=adding+and+subtracting+rational+numbers+worksheet+pdf In PDF document text
    • http://zotukoku.kissandtails.com/uploads/1/3/1/4/131407178/d55323.pdfIn PDF document text
    • http://nesar.thameswardcommunityassociation.com/uploads/1/3/1/3/131380600/disifemaviter_jogafajadi.pdfIn PDF document text
    • http://files.massoutrage.com/uploads/1/3/0/7/130738771/60f566f05c.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/1/0431/8606/1480/files/53340893807.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1033/7440/files/71005976193.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/vofemezunarogejilokodil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2775/1321/files/understandable_statistics_9th_edition_solutions.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/0668/7389/files/widugupifakobotun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1039/1207/files/89012936897.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6471/1575/files/79471073040.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0222/5059/files/duvujomosakepesubomimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2366/2236/files/pomozagaleme.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 2

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_off00005b0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5B0A 5856 bytes
SHA-256: 5877b08a31e9901929ad589bdda114f3d8acca4069b5b8bb169e5e9b644562b4
font_01_sfnt_off00006ecb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6ECB 10944 bytes
SHA-256: 9b3edaf91f0a16b0a68e305dc0145e40cdf2943674ea1084774b4ba2dcbf172b

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