Malicious PDF — malware analysis report

Static analysis result for SHA-256 8e3a86d4efa9ce1d…

MALICIOUS

PDF

40.5 KB Created: 2020-08-24 01:42:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 27f3c9189b741e6999662238ea4bc3fe SHA-1: 7a64133c8224fe553b9787848fa2703726421a28 SHA-256: 8e3a86d4efa9ce1d4e14a5af59315311476a1a70e5c3f34e29b6c5d74c5f508f
194 Risk Score

Malware Insights

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

The PDF was flagged by multiple critical heuristics for containing malicious redirector links and a large link farm. The ML classifier also strongly indicated maliciousness. The embedded URLs, such as 'https://ttraff.ru/pify?keyword=basic+zoology+pdf', are likely part of a scheme to drive traffic to potentially harmful sites or to manipulate search engine results.

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=basic+zoology+pdf In PDF document text
    • http://fopom.bridgeportcf.org/uploads/1/3/1/8/131871787/1802088.pdfIn PDF document text
    • http://vakonow.doublejoutfittersny.com/uploads/1/3/1/6/131606271/2717341.pdfIn PDF document text
    • http://kopufojo.lightbulbson.com/uploads/1/3/1/0/131071252/budobifizojuxen-wibiwiz.pdfIn PDF document text
    • http://vuwomozu.artculturevs.org/uploads/1/3/1/3/131379394/debazemololumobug.pdfIn PDF document text
    • http://files.english.shenfieldlearning.com/uploads/1/3/0/7/130775448/pogedebidejun-xuramomatoka-gibepipuxut-majidowepaf.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/1/0437/6467/8807/files/payg_withholding_payment_summary_annual_report.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/62374455636.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7405/9424/files/dabevudujebosu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4097/1674/files/nimujorosovonobobaboruxib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4831/2740/files/asdfg_lkjh.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/37464695445.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9095/8749/files/desanavabiki.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5528/3366/files/background-_size_css.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1810/0637/files/avery_template_8163.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000602f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x602F 5428 bytes
SHA-256: 94737272d04e99d4c0256695fb435c9778ae5b2dcf6436f52c764801b19fd718
font_01_sfnt_off000072c3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x72C3 10228 bytes
SHA-256: 11e8b2a176941d6dad6949df43aead7e6427cf232c87c8d3faee73e479153ff6

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