Malicious PDF — malware analysis report

Static analysis result for SHA-256 85a15f20fd5efa25…

MALICIOUS

PDF

39.9 KB Created: 2020-08-26 18:30:09 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1fa5cea648e9dcccf4619d5c99b9ff86 SHA-1: 7e2558f82ef850b6ef41bde38dbc1cb80d8cedc4 SHA-256: 85a15f20fd5efa25d3b44efa2a5d296334e36ef81003beb52234b6a9f672238e
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, including a critical redirector link to 'ttraff.ru'. The heuristic 'PDF_SEO_LINK_FARM' indicates a large number of external PDF links, suggesting an attempt to obscure malicious activity or drive traffic. The ML classifier also strongly flagged this PDF as malicious. While no scripts were extracted, the presence of a malicious redirector and link farm points to a phishing or malware distribution attempt.

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=raja+endon+mastura+wedding+flowers In PDF document text
    • http://files.lquertportfolio.com/uploads/1/3/2/7/132710756/5409682.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/1/0460/1633/1943/files/zenonia_4_leveling_guide.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9954/6009/files/44045365246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5463/6966/files/muzasimufixatov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/3087/9136/files/boxorepik.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7166/7360/files/compulsory_voting_mini_q_document_g_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0749/8647/files/jixawevotewigiwetuvoxe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2503/8498/files/aromatic_hydrocarbons_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4997/5959/files/xizurobuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/27622062760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0652/4566/files/33077575955.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5015/6700/files/anthya_bhangi_song.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 5

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_off00005535.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5535 5404 bytes
SHA-256: 1c23c7b767951703b8b8b0dd3dd3e636f9fbcd632b4209d9d59982d5b6c6b0b2
font_01_sfnt_off0000679b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x679B 13844 bytes
SHA-256: 69e186864786b061597769fdfee35a629a5e9745f91b6b1fa354819a7251e547

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