Malicious PDF — malware analysis report

Static analysis result for SHA-256 4a751a052cf0322c…

MALICIOUS

PDF

39.5 KB Created: 2020-08-13 21:29:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ff899bf26c065ab61b2fad9da7bd0cf4 SHA-1: 49bc18ad9a00b65541eaf40dc0f28ad7d9a9766e SHA-256: 4a751a052cf0322cf146b8c9a2dae3111f03e1c8d7f402f5f6934411c1e87d03
194 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. The document body, though heavily obfuscated, contains the target URL and a search query related to SSRS reports, suggesting a lure. The PDF_SEO_LINK_FARM heuristic indicates a large number of outbound links, many hosted on Shopify, likely to obscure the malicious redirector. The primary malicious IOC is the redirector URL.

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=how+to+add+graphs+in+ssrs+reports In PDF document text
    • http://nadubili.memoryreloaded.com/uploads/1/3/1/4/131482976/jukudisukasa_wululosa_dugozasurekizaj_pikebulafube.pdfIn PDF document text
    • http://darivofu.fillmorepaws.com/uploads/1/3/1/3/131380429/3d335b0e267.pdfIn PDF document text
    • http://files.joel-nichols.com/uploads/1/3/1/3/131379844/8746961.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/1/0434/1599/4529/files/bezepavamipaborozew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/levijigeror.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/barlowe_s_guide_to_extraterrestrials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4327/4402/files/10528266049.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/5387/0232/files/engine_bearing_catalog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xoxolesusoziviro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7437/9157/files/metabolic_syndrome_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negopolikutowuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pamuzinesikajojefex.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7618/1400/files/sedapomuzidewavibudanara.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/we_are_all_cannibals.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5901/9927/files/5x5_sliding_puzzle_solver.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9710/4288/files/1988594156.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7154/6279/files/14188873438.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 6

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_off00005c9d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5C9D 5244 bytes
SHA-256: 61f16011c44ace0a928ec350d286e11e59efcc2869336875e230948f5169f4c5
font_01_sfnt_off00006e7d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6E7D 9640 bytes
SHA-256: 46826b1f79ddaf5188cfd10224bba890cd28fe5c5a5aa9b34b27c9cbd2e147d0

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