Malicious PDF — malware analysis report

Static analysis result for SHA-256 fd91c809aa32613f…

MALICIOUS

PDF

39.4 KB Created: 2020-09-14 04:47:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 6990e2d72fad958cbc6b4e6af5ddd9ef SHA-1: 7cd7f19537ca1e9cc9109ac6c51a2f6e1920658f SHA-256: fd91c809aa32613fdccd86fa815f413a2792d569c559b93388f340d5946f3c20
194 Risk Score

Malware Insights

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

The PDF file contains a mass of external links, with one prominent link leading to a known malicious redirector. The document body, though heavily obfuscated, contains text related to refrigerator dimensions and the malicious URL, suggesting a lure to trick users into clicking the link. The heuristic firings confirm the presence of a malicious redirector and a link farm within the PDF. No scripts were extracted from this sample.

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.club/wix?keyword=whirlpool+french+door+refrigerator+dimensions In PDF document text
    • http://fefivisa.mreisley.com/uploads/1/3/1/4/131409474/robovirixonilo.pdfIn PDF document text
    • http://files.kairosskate.com/uploads/1/3/1/6/131637149/medutetenajinaluru.pdfIn PDF document text
    • http://zozenenox.theduangroup.com/uploads/1/3/0/7/130775792/mojuwilubevanef-suvesugazakuden.pdfIn PDF document text
    • http://files.bluelionhomeinspections.com/uploads/1/3/0/7/130776208/7905739.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • https://static.usrfiles.com/ugd/289c5e_203b9ed700464446bd7ecf65bee37e34.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/8ac1ab_3c6e8d328ed1417ca5e5d906e105e1f7.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/0182ef_66d92c3786db47799dacfd192e807ea1.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/aff7ca_348ee614be21459292682c8772a189ef.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/9bd8c3_dac34ff327044825b88db2951d5cb418.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/61b8bf_8189d35e448446a5875e4a87953c4f72.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/f34323_001b59a30981408e962e8c6ff4407a61.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a07927_0f15a7659b4d481d8076c5c3348a0135.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/a4d998_337fd44d851e4687aec73e5d6f0d3dcb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/decf6f_ad822e4181ff47e5a55c92d2b43dc0cf.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/4aae87_06816d8607944948be0c15a2680b6b49.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 3

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_off000059e3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x59E3 5580 bytes
SHA-256: 75ed693826d390c4e9472a4106befd0315d95413845531dc8427d786b1f029ca
font_01_sfnt_off00006cc5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6CC5 10480 bytes
SHA-256: db1ecc92147618c1b84ad1761b8b3832840134617bf00b36f1e98255222c68a2

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