Malicious PDF — malware analysis report

Static analysis result for SHA-256 aab544b1107be746…

MALICIOUS

PDF

34.7 KB Created: 2020-08-03 12:42:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3ef9d16cee277063507c6a1cbf7b6ab5 SHA-1: 5028529c542a081bf174fd9a723891a2687ca820 SHA-256: aab544b1107be746892306474511b188fe167e45efd0e3e9fd33f3804b755489
202 Risk Score

Malware Insights

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

The PDF contains a malicious redirector link disguised as a utility for compressing PDF file sizes. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the primary link leads to known malicious infrastructure. Additionally, the PDF_SEO_LINK_FARM heuristic suggests a large number of outbound links, many hosted on cdn.shopify.com, which is likely used to obscure the malicious destination. The SE_DOWNLOAD_BUTTON heuristic further supports a lure-based attack. No scripts were extracted from this sample.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=compressing+pdf+file+size+online In PDF document text
    • http://files.iancurtisarchitecture.com/uploads/1/3/0/9/130969372/jodirezinek_zetilejuvixebu_pejatedugugugex_zerivugudajepo.pdfIn PDF document text
    • http://files.andrewnorthmusic.com/uploads/1/3/1/3/131379792/01f3d0012.pdfIn PDF document text
    • http://files.nauticalreplicas.com.au/uploads/1/3/2/6/132695734/7fe7eb.pdfIn PDF document text
    • http://files.holleywoodcontracting.com/uploads/1/3/0/7/130775652/a19a3.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/1/0433/4754/2175/files/61016087278.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0428/0481/files/59961172952.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2327/7973/files/44037873105.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0069/1868/files/4622475396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4173/4311/files/10989746449.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2419/4468/files/pekesomizakibetoziwasutug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9067/3813/files/zukomax.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/fulefevizurosojasi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3630/2750/files/count_items_in_list_python.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/serinoxanikefepido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3128/1312/files/25099615252.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_off00004958.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4958 5108 bytes
SHA-256: b55a1e5dbcf0a51061fe70f3a1301cbc5ea50a190c508d945364acc2bd871618
font_01_sfnt_off00005aa8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA8 10460 bytes
SHA-256: 2643b3a75975802a10d04c56df44ecb26f996f3c1ba43e0b70ee68f397592faa

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