Malicious PDF — malware analysis report

Static analysis result for SHA-256 8653e6ed2df754ea…

MALICIOUS

PDF

35.1 KB Created: 2020-08-10 15:00:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: fef68ef7868d17b6c4c15c6c3e68e4c5 SHA-1: 17132bcb65e03ca0452c39cb1dfaf2d0fd8cae52 SHA-256: 8653e6ed2df754ea83e50ffb96e722a63e02f8593ad6e85fe4fb2cea65baf3fb
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a link farm and a redirector URL, indicating a phishing or scam attempt disguised as a document download. The ML classifier strongly flagged this PDF as malicious. The primary malicious URL identified is https://ttraff.ru/pify?keyword=cambridge+primary+science+stage+2+learner+s+book+pdf, which likely leads to further 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=cambridge+primary+science+stage+2+learner+s+book+pdf In PDF document text
    • http://files.nomadesgourmandes.com/uploads/1/3/1/4/131482939/5882482.pdfIn PDF document text
    • http://files.annasofiestensgaard.com/uploads/1/3/1/3/131380511/sikem_givofe_nipunubuxevu.pdfIn PDF document text
    • http://files.makinglandscapes.net/uploads/1/3/1/3/131379231/kufelivaw-liwip-kulivo-mozajamipomibab.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3971/8552/files/12207265185.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9587/3949/files/mmpi-_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1517/5335/files/loradugowuwifasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9262/1978/files/zegimofezodedurofasasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/0274/9347/files/macbeth_graphic_novel_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/5015/3622/files/7706612111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1290/7427/files/97863370907.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/6876/5848/files/nejasikegiborodalekanu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/41841620016.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 7

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_off0000409e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x409E 5724 bytes
SHA-256: 8821611b8da64dd361f83758d447ff8ade217246c0e2e370c05c0f88a1f180f4
font_01_sfnt_off0000540c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x540C 8608 bytes
SHA-256: ed0cfa95cc543b7cc7955bb9eec136b22443e9a8da07823feae7f9ecbcb6adbd
font_02_sfnt_off0000714e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x714E 4324 bytes
SHA-256: 7f6049e5011acf0e8581793f2bc2bb947aac2929fdb77abc318b2a6155c1ef71

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