Malicious PDF — malware analysis report

Static analysis result for SHA-256 b605138ffca61ea8…

MALICIOUS

PDF

46.3 KB Created: 2020-08-20 01:07:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 2ca21dc941b23007b9054eceaa608b77 SHA-1: e8025d7171b582d594f84000bce624f020439250 SHA-256: b605138ffca61ea85aa086b441c0a2c7fd2b3770fce7d241e24587b9ab0e084c
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, with a primary link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to 'design patterns explained pdf free' and the authoring application 'wkhtmltopdf', suggesting a lure for users seeking such content. The presence of multiple PDF links, many hosted on Shopify, indicates a link farm strategy to improve search engine ranking and distribute malicious links. The ML classifier strongly supports the malicious nature of this PDF.

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/pify?keyword=design+patterns+explained+pdf+free In PDF document text
    • http://porevowag.twobeinchili.com/uploads/1/3/0/7/130775364/rewesofekokibisu.pdfIn PDF document text
    • http://files.stevescustomcarpentry.org/uploads/1/3/1/4/131437980/vuxuliwexozirajub.pdfIn PDF document text
    • http://rixevo.lovethetruth.co.uk/uploads/1/3/1/6/131606552/jarutakuxawalajodag.pdfIn PDF document text
    • http://paxajet.oxfordstation.pl/uploads/1/3/0/8/130814328/98556.pdfIn PDF document text
    • http://goberabav.mustbeheaven.com/uploads/1/3/1/3/131383434/4583544.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/1/0431/1416/8480/files/3603437285.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8286/6072/files/78427687755.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5498/9466/files/24293501716.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5122/1143/files/84495393816.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2561/3475/files/gebanexurew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1503/7343/files/zupazulisabanepitejudad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0178/1156/files/asthmatic_drugs.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/4802/4741/files/polodejalaruzutofepij.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/2674/9339/files/18488724045.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/8030/3263/files/vasozevasolefabu.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_off00006ba4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA4 4956 bytes
SHA-256: 6a89c39c443ddc2b653f3ef5dca6aacac1f3c135b06134a24290b7bcc483b6a5
font_01_sfnt_off00007c89.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C89 9816 bytes
SHA-256: 7e436e6978b1255ea7e9fe1be6b5ebd257aade2765f5df9d2d409a5a7177d4d5
font_02_sfnt_off00009df7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9DF7 4324 bytes
SHA-256: ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230

Open this report in the interactive analyzer, or submit your own file for analysis.