Malicious PDF — malware analysis report

Static analysis result for SHA-256 53db31c92ee1ef9a…

MALICIOUS

PDF

57.1 KB Created: 2020-08-03 16:24:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e7382752dfab18b1cb98eea6d9da34f8 SHA-1: 0275b3d1b6d9c5c0e79cc7235856a0f8db7970ca SHA-256: 53db31c92ee1ef9abe16344d99caff6c6e96b47c4580be1fa29fc21fb0ca0151
202 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body text and heuristics indicate a lure to click a download button, which likely leads to the malicious infrastructure. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic to increase visibility.

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=upload+pdf+to+google+sites In PDF document text
    • http://files.mooneycooleydance.com/uploads/1/3/1/1/131163854/9093767.pdfIn PDF document text
    • http://rolikim.norbyco.com/uploads/1/3/0/7/130775422/bewaxiwulikubiguwa.pdfIn PDF document text
    • http://files.iscariotstories.com/uploads/1/3/2/7/132740997/zuvudetogamikez.pdfIn PDF document text
    • http://files.caalam.us/uploads/1/3/1/4/131438397/neposanejori.pdfIn PDF document text
    • http://files.jonathaneccleston.com/uploads/1/3/1/3/131379134/9791134.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/1/0432/1725/6603/files/7785394246.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6772/7269/files/40589081488.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9754/7157/files/67033050615.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/8488/1824/files/9491619933.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/8415/9903/files/look_of_disapproval_meme.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/5033/4368/files/67336885843.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6131/2676/files/63272851795.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3496/8213/files/64981945119.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8555/3061/files/pefeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1401/3606/files/47709314999.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 8

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_off00009434.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9434 4788 bytes
SHA-256: ae5b84d74c8a67177501503125eedaeef9dd22bb90e140901a83f27a9b0fea99
font_01_sfnt_off0000a48f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA48F 10828 bytes
SHA-256: 243f4ecc07c224e9720d75b03f7391ffa0fb1eddf7c3140c5c077245e2997afb
font_02_sfnt_off0000c97d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xC97D 4324 bytes
SHA-256: 4fcfa7c68d76e23b667942a3ac892d2d5d88346478daafc61479ad4df4af3dd3

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