Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa5e0cc484679414…

MALICIOUS

PDF

36.5 KB Created: 2020-08-15 03:17:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e5f52ca5e884aae636d320e850236bd6 SHA-1: ee05e79fabb56c10d0b44c642f50ced8012add88 SHA-256: aa5e0cc48467941410af7617fe3ea85f0bd7c6a19b874c5284c85016dfd24c3f
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a large number of embedded links, many of which point to external resources. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the same malicious URL. This suggests the document is designed to lure users into clicking malicious links, likely for phishing or malware distribution.

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.com/wb?keyword=pintura%20manualidades%20americana In PDF document text
    • http://jajabegak.preciouscollective.com/uploads/1/3/1/1/131163635/47f50.pdfIn PDF document text
    • http://files.decibel-doo.com/uploads/1/3/1/4/131408942/9687912.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/1/0429/9161/6153/files/socrates_apology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/approaches_to_psychology.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8812/4835/files/2913104967.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9531/7911/files/jegiketolapijevanijeve.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/tufajotojitumawudawemir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1760/9122/files/30480490133.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3173/2119/files/barbituric_acid_derivatives.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0886/8001/files/kivijikinegozugodevad.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3796/4960/files/annex_8_icao.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 2

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_off0000442f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x442F 4856 bytes
SHA-256: 39314729f9ac212421e39d6e7e692074de0b9138ef5f1ce7d68e7210b434bb5a
font_01_sfnt_off00005482.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5482 10124 bytes
SHA-256: b7021df546008659fc3f34c2eb13e0c6ddb343bcb003c7e7a1c4098d705b81be
font_02_sfnt_off000075e8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x75E8 4324 bytes
SHA-256: d1f4a20f0e35a0564be54678b929bb8c711862c507f070c2b9a6abea8daf4378

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