Malicious PDF — malware analysis report

Static analysis result for SHA-256 7f1909dc7d9b95c4…

MALICIOUS

PDF

43.9 KB Created: 2020-08-06 14:07:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5618ef97ba778e8d55113a3f22e92d01 SHA-1: 1decbcfec8429b9773b2948017204a9d8dd5150b SHA-256: 7f1909dc7d9b95c46d760b846d391c2c82033769f5db59056b3d04bfbc956669
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many of which point to a redirector URL that is flagged as malicious. The document body, though heavily obfuscated, contains the same redirector URL and appears to be a lure for users seeking educational materials. The ML classifier also strongly indicated maliciousness.

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.com/wb?keyword=isometric%20drawing%20worksheet%20with%20answers In PDF document text
    • http://files.orderdipped.com/uploads/1/3/1/0/131070394/a8fcc33b5.pdfIn PDF document text
    • http://bikuguzi.julioespinosamusic.com/uploads/1/3/2/6/132681947/potepugatasilo.pdfIn PDF document text
    • http://files.kmaysphotography.com/uploads/1/3/0/7/130776111/linarunasodil.pdfIn PDF document text
    • http://files.leitzop.com/uploads/1/3/1/0/131070751/joraw.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/1/0432/4202/9215/files/lixaxilazijaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3772/0733/files/how_to_do_italics_in_discord.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9715/3943/files/70743666479.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3123/2674/files/bojudesaridowefofizolole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/7895791712.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/0639/9388/files/ict_business_case_example.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/30553092986.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/21884581804.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9971/6770/files/laxagisamivowatu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1714/0386/files/malwarebytes_2._2_1_key.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8581/6218/files/20066286259.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0995/0367/files/77256458227.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f3d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F3D 5204 bytes
SHA-256: 1e431e3cf9e97dc6ed634f9119b77f92c5e78e3a5a506c24a307a54aa4135d8b
font_01_sfnt_off000070ce.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CE 10516 bytes
SHA-256: d4b6a03366434d552decbe1ff7729e488f66a08afa6b15841379a34126503d2f
font_02_sfnt_off000094a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x94A6 4324 bytes
SHA-256: 0d0f64e27578eb124b8bc81c7eceacdd166e22eddd95c81328e9fbd7de2a6333

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