Malicious PDF — malware analysis report

Static analysis result for SHA-256 891a189b6d0e761f…

MALICIOUS

PDF

72.4 KB Created: 2020-08-15 01:21:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: d53e5f8af86398f4f27b8c294d5bdde1 SHA-1: 22593fe3ebda4dd3e481ebcb496958c5eb22e2c8 SHA-256: 891a189b6d0e761fa650711513c4fef1e6687131ec501b2793a7b12e80bef0da
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains multiple heuristics indicating malicious redirector links and a link farm, suggesting an attempt to drive traffic to malicious sites. The embedded URL points to a redirector that is known to host malicious content. The document body, though heavily obfuscated, contains a URL that matches the malicious redirector found in the heuristics.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9998

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.cc/pify?keyword=d%2526+d+descent+into+avernus+pdf In PDF document text
    • http://files.baytutoringnz.com/uploads/1/3/1/4/131437299/9355977.pdfIn PDF document text
    • http://dojaromu.paxcon.org/uploads/1/3/2/6/132682646/ninexemijatimonigeku.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/1/0434/8972/2534/files/caffeine_mac_chip.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2072/1055/files/tidusagutirosopexasotival.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/55160595480.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/32102083324.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1179/3315/files/61341810862.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5710/9399/files/99659463388.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/4492/0734/files/allylic_strain.pdfIn PDF document text
    • https://medlineplus.gov/vitamind.htmlIn 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 4

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_off0000d7ed.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD7ED 3484 bytes
SHA-256: 48524656b3e374db2655985bb23235a78a7fb2c8eb08756719506f3bf9aeaf8e
font_01_sfnt_off0000e358.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE358 10532 bytes
SHA-256: 837d64cfac4c6dc362bd2651473613ea364bcb5c9192f2be55c9d904e4a282f2
font_02_sfnt_off00010752.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x10752 4324 bytes
SHA-256: b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c

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