Malicious PDF — malware analysis report

Static analysis result for SHA-256 772d5b3e362d0724…

MALICIOUS

PDF

49.0 KB Created: 2020-08-18 21:29:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b163a16ce2e79a69576e841ba38811bc SHA-1: db27a881d57d4e1127cd50dbbe2d8459a24db6f2 SHA-256: 772d5b3e362d072420e3c0ea10d876b094e08f25a782f171701f2cfebbf483f8
202 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of external links, many of which point to a redirector infrastructure. The document body and heuristics indicate a lure related to 'school admission form pdf format', suggesting a phishing or social engineering attempt. The ML classifier strongly flags this PDF as malicious, and the presence of a redirector URL like https://ttraff.cc/pify?keyword=school+admission+form+pdf+format indicates a malicious workflow designed to lead users to potentially harmful content.

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.cc/pify?keyword=school+admission+form+pdf+format In PDF document text
    • http://files.aarestoration.com/uploads/1/3/0/7/130776763/rajigevekese.pdfIn PDF document text
    • http://files.352coaching.com/uploads/1/3/1/3/131383544/julotide.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/1/0434/0239/5813/files/vulabipuzovekuram.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6013/3030/files/react_native_emulator.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8333/3799/files/81931411374.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6830/1212/files/dosabepupun.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7317/4693/files/43373521470.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3425/5265/files/3382545289.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3609/0267/files/pefemozukaliwavunika.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0803/2922/files/job_application_letter_for_english_teacher.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/9024/6822/files/buffalo_wild_wings_menu_sauces.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9485/2252/files/xarufevelusaxi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/2132/8807/files/begedijanigusifixasag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2748/1255/files/34830555060.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3694/2234/files/sony_cyber_shot_manual.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 7

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_off00007cb8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7CB8 5500 bytes
SHA-256: cff7b4010e2773905a208450b14fed2edfd0530a62fa43d3cc6c06ed35d2fff9
font_01_sfnt_off00008f38.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8F38 12284 bytes
SHA-256: b7f12fd96f9bd617bf415bb4ec8d431f6e1450daed18629f07fb40d4799e1ba5

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