Malicious PDF — malware analysis report

Static analysis result for SHA-256 523da16c40907f37…

MALICIOUS

PDF

46.1 KB Created: 2020-07-30 22:19:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5427d1a736af43431ac47dc9fb48ed72 SHA-1: 8db6a7647be20b02a2cc34f8ac2f289f51b145f5 SHA-256: 523da16c40907f3764fb59c2f62193cb092dbb56283b7127dac0c90d93b5d632
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a critical heuristic indicating it links to known malicious redirector infrastructure. Additionally, it features a PDF link farm, suggesting an attempt to manipulate search engine results or distribute content broadly. The presence of a 'download button' lure further supports a social engineering attack. The primary malicious URL identified is ttraff.ru, which is used in conjunction with a keyword suggesting a fake download. 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=free+download+pdf+to+jpg+converter In PDF document text
    • http://files.ljohnsonlab.com/uploads/1/3/1/1/131163533/foludog-ligojukexif-voxosup-valufasaxa.pdfIn PDF document text
    • http://files.pickleball-germany.net/uploads/1/3/0/7/130775634/boxopamokufafame.pdfIn PDF document text
    • http://files.bethelwoods.org/uploads/1/3/1/4/131406036/4783685.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/1/0430/5721/7693/files/tinijibawumelogomemawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9902/7611/files/22281800100.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4513/5260/files/pudel.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6100/9829/files/mafitero.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3018/4098/files/25078858802.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0918/5688/files/gibifudaburefexu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9861/9557/files/56015787472.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/78539107281.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9313/8333/files/zosixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8217/7946/files/zuvovimisigexovaf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7675/5349/files/jugagurezenejavorinaj.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 6

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_off000078d9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x78D9 5068 bytes
SHA-256: dc25b58eaab7ae719f5dd90e8810e2877e6e5e134700fda2e82ea29c8593237d
font_01_sfnt_off00008a49.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A49 9704 bytes
SHA-256: 7e393d0102ad29dc2f267a073d382c927875d6a13de515bd97a2411b4cb22dc2

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