Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ac477629cd2d9eb…

MALICIOUS

PDF

43.2 KB Created: 2020-08-01 20:45:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 8847a4b00462b310a93544f3155890cd SHA-1: 94e249765a07730ba8189c5d3d8124c296abb973 SHA-256: 1ac477629cd2d9eb07b9a59d02b27e8aee8598d4c5a418aefe897f6cfa4e3b51
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The document body is heavily obfuscated but contains the malicious URL. The presence of numerous links suggests a link farm or phishing attempt designed to lead users to malicious content. No scripts were extracted, limiting further analysis of specific behaviors.

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=wolf+knight+greatshield In PDF document text
    • http://files.thebannedunderground.com/uploads/1/3/1/8/131856991/wutudumagolop.pdfIn PDF document text
    • http://files.esperrealms.com/uploads/1/3/1/4/131453615/gagiloxa.pdfIn PDF document text
    • http://files.macdonaldsfarmersalmanac.com/uploads/1/3/1/4/131407067/724034.pdfIn PDF document text
    • http://files.tandemmom.com/uploads/1/3/0/8/130813692/givamono.pdfIn PDF document text
    • http://files.lecontent.eu/uploads/1/3/2/8/132814022/luwijomarivusopojum.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/1/0434/2287/5797/files/74386065286.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2174/5822/files/widole.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2562/8316/files/service_host_sysmain.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5719/2853/files/jokuxabetowidoninoposuw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0159/3502/files/79473177520.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5744/6038/files/15196786701.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4244/6231/files/48461356122.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/25476853319.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8891/2290/files/wodoferino.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4131/6249/files/nofexejusivinoz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8205/5842/files/vetit.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/8628/8798/files/xipilonitoxizugotogowinag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5093/3156/files/apache_poi_tutorial_pdf_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4241/4492/files/colander_microeconomics.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4896/0151/files/viporetak.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
🗂 Part of campaign: mitchellhabitat.org 8 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006330.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6330 5244 bytes
SHA-256: bb4d77290b20d2184ecd3b2bca79ea93e53b78e99841161c4e57a68fec42af8e
font_01_sfnt_off0000750f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x750F 13596 bytes
SHA-256: 73bb6d35932f7bd97d73aca523631a010defe9ae568228929c48aa7ddb0e6086