Malicious PDF — malware analysis report

Static analysis result for SHA-256 e7672efc27a21f0f…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 08:04:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ac14788f582dadd63f195bbc76fbc30 SHA-1: 76e20a8867c00d492ed5f76877c7568206ce30c1 SHA-256: e7672efc27a21f0f6b1eee3525d294ccca46e742b4d02d8b3c7704192d297063
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the text 'Grammar practice activities pdf' and the malicious URL, suggesting a lure to trick users into clicking the link. The ML classifier also strongly indicated maliciousness. The PDF_SEO_LINK_FARM heuristic indicates the PDF is part of a link farm, likely for SEO manipulation or to distribute malicious links.

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.cc/pify?keyword=grammar+practice+activities+pdf In PDF document text
    • http://files.pukasurf.com/uploads/1/3/1/4/131437983/ruruvowoma_morojuzimo.pdfIn PDF document text
    • http://files.edzizatrails.com/uploads/1/3/1/3/131398406/toxosef_kunedinim_wotuzekitofo.pdfIn PDF document text
    • http://files.sixftswellspress.com/uploads/1/3/1/6/131637701/wixatezak.pdfIn PDF document text
    • http://files.eberhartmgmt.com/uploads/1/3/1/4/131453194/jizosofumomaj_diseva.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/1/0430/4030/9402/files/telidovumokoxoj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6114/8837/files/91653920243.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7012/8277/files/65821619705.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9811/9075/files/256628292.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0127/3758/files/fudikivalurudomubiz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6387/8566/files/62514147371.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8719/0434/files/vunuvopeliwugimanozapat.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4669/7125/files/the_carnival_of_venice_trumpet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5007/4269/files/photoshop_2019_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4527/3248/files/92803322860.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3397/7247/files/kifarurorixidikebazepo.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000762e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x762E 5360 bytes
SHA-256: 7680c4e16fe38b5765eb0f57b60563d8b18dec06fc931ea14dc7def91397d9db
font_01_sfnt_off0000885a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x885A 10032 bytes
SHA-256: 4a8883261bb078a01e7e032a33f918305cc9fa6b3dd4e0bc6fae3ad358990ab4

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