Malicious PDF — malware analysis report

Static analysis result for SHA-256 ab509c2ca2e0b3e9…

MALICIOUS

PDF

43.9 KB Created: 2020-08-08 09:43:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 97262ef42b3e3ef10d82e887264f3cdf SHA-1: bf15e65acd321c52fc2d900659ff2dd8271ccecf SHA-256: ab509c2ca2e0b3e96dec639be6f894da7a33a2fc7d941fc8472ea43e7951a158
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with one specifically pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the target URL, suggesting a lure to download a PDF. The presence of multiple Shopify URLs and other file-hosting domains indicates a link farm strategy to obscure the malicious destination. The ML classifier strongly flagged this PDF as malicious.

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=relationship+between+attitude+and+behaviour+pdf In PDF document text
    • http://files.barbaralyons.net/uploads/1/3/1/1/131164114/7040810.pdfIn PDF document text
    • http://leravu.mountaintrafficcircle.com/uploads/1/3/0/8/130874254/bogav_dorerakafenow_savutagoferud_tokexi.pdfIn PDF document text
    • http://files.msmaco.com/uploads/1/3/1/3/131380440/guxupewuraba.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/1/0434/8300/5078/files/48852175051.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/5106/3195/files/how_to_rotate_iphone_video.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9528/4130/files/xajonozukesari.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/5035/1257/files/vw_bentley_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7937/7830/files/b._com_sem_3_books_gujarati_medium.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2682/4863/files/12572977471.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1692/0996/files/vukazekedanuwelesuge.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6696/4630/files/33668117516.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2073/0020/files/21729578109.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0631/2098/files/suny_albany_transcript.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 4

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_off00006d04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6D04 5428 bytes
SHA-256: 9e017145d83e456f649b69e4081077125fea3ba78a3a32c32c04261824890c35
font_01_sfnt_off00007f88.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7F88 10212 bytes
SHA-256: bb918337378f750018501f64f7f0f6a85ed56a70d5428ef312dfd5df8ce420e9

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