Malicious PDF — malware analysis report

Static analysis result for SHA-256 19f5f28681c24682…

MALICIOUS

PDF

46.6 KB Created: 2020-08-03 13:01:24 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: 9e33d4fcadebe6bba09dc7c7a4d34dd6 SHA-1: f8806ceddb6ea73a76a452cea5ae024ec170fb26 SHA-256: 19f5f28681c246825ff7cde9bdd029579b403a1a705d5735bff07ed02f79b843
194 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, specifically pointing to 'https://ttraff.cc/pify?keyword=keystroke+dynamics+as+a+biometric+for+authentication+pdf'. This URL is presented within the document body, disguised as a research paper title. The PDF also exhibits characteristics of a link farm, with numerous external links, many hosted on shopify.com. The ML classifier strongly indicates maliciousness.

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.cc/pify?keyword=keystroke+dynamics+as+a+biometric+for+authentication+pdf In PDF document text
    • http://files.ultimatesourceoflove.com/uploads/1/3/0/7/130739564/8284447.pdfIn PDF document text
    • http://files.lisaworkman.com/uploads/1/3/1/0/131071145/50420c449e.pdfIn PDF document text
    • http://files.adamtierneyeliot.net/uploads/1/3/0/7/130775432/b3b5a.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/1/0433/4908/2264/files/zasesivobebazovebure.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0471/4404/files/pijesigevetugukomob.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5970/8058/files/penanulikuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/xedowunezo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1708/4839/files/96148719725.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/6447/4262/files/bedufepoxuj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6440/0798/files/44347301257.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0896/6301/files/72152743419.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/0657/4240/files/89061612225.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/3505/5512/files/desapo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/nisexabidubukov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0636/0730/files/rukijepitilodajelewo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6574/5312/files/1646122189.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_off00007729.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7729 5640 bytes
SHA-256: 85ad3b751dea2f8810dacfd5b7290db22d79dcf78b096115387163a30c293581
font_01_sfnt_off00008a31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A31 10096 bytes
SHA-256: 4f1751e35d81015c31e626669d4112a97227ab99169b44ae056d72ad275ba94d

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