Malicious PDF — malware analysis report

Static analysis result for SHA-256 0acc740f1aaeb4c6…

MALICIOUS

PDF

55.7 KB Created: 2020-08-08 15:40:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c5f22a1a30afb843d24e61154be1441d SHA-1: c413629ace5a972b5f7624263d84de859e41833f SHA-256: 0acc740f1aaeb4c62b08d258b89c0813f55d3b2c389f07fddc894ab2b2517c1b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple embedded URLs, with a critical heuristic firing indicating a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains URLs that appear to be part of an SEO link farm designed to lure users into downloading files. This suggests a phishing or malware distribution attempt.

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=biblia+ortodoxa+bartolomeu+anania+pdf In PDF document text
    • http://files.amarilloparties.com/uploads/1/3/1/0/131070992/xotilaj_gakoge.pdfIn PDF document text
    • http://files.darlanagel.com/uploads/1/3/1/4/131407106/921393.pdfIn PDF document text
    • http://files.stlukeamezionchurch.org/uploads/1/3/1/3/131398428/lozugupufadenijuxa.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/1/0427/3173/3159/files/libros_sobre_auditoria_financiera.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/1364/3167/files/12205481336.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6508/9949/files/nuwunorativ.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0904/7717/files/20154110414.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9578/5629/files/79249420544.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/3864/4136/files/90269098269.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1945/3095/files/mabegisapowewuji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9146/7176/files/bekexokadurojutokijunivut.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/6320/6307/files/kawufazo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1594/6918/files/34088497592.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1871/5289/files/27421872130.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3170/7294/files/37881734238.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5452/8677/files/basel_3_sbp.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: f-y-t-a.com 4 samples

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008d12.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D12 5148 bytes
SHA-256: 19fedac873e30626364496610c62789e7173383c61e2c84fca88cf408e7fb0c8
font_01_sfnt_off00009e71.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9E71 11004 bytes
SHA-256: f2d204a46cd161d4d6957471b2dc213286db5e2a829230864f79c6a40b1c0698
font_02_sfnt_off0000c17b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC17B 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34