Malicious PDF — malware analysis report

Static analysis result for SHA-256 18376cba6850f66d…

MALICIOUS

PDF

53.0 KB Created: 2020-08-22 00:50:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: bef0df22aa0e137fed69bfb1a3847317 SHA-1: d59f5190b9423d27f8915463a15c0672f2bee37c SHA-256: 18376cba6850f66d5340439d13f3aa569a5f510b1c6c5675605240ce727a2b20
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains multiple links to a redirector service (ttraff.com) which is flagged as malicious. The document body and embedded links suggest a phishing attempt, masquerading as a free download of a mindfulness guide to lure users to a malicious site. The ML classifier also strongly indicated 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.com/pify?keyword=a+catholic+guide+to+mindfulness+pdf In PDF document text
    • http://files.scenicroadsrv.com/uploads/1/3/0/7/130775640/seniziru.pdfIn PDF document text
    • http://files.stemacademyband.com/uploads/1/3/2/6/132695851/fatejukovereja.pdfIn PDF document text
    • http://figopu.newboilermerseyside.co.uk/uploads/1/3/1/0/131070374/6573509.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/1/0433/7506/7294/files/24333922793.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5765/9547/files/bifuzov.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9444/2137/files/43449346574.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7091/4717/files/tizilobonufogunom.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4214/3388/files/18747866541.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7417/4624/files/arcore_for_android_6._0.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/8th_grade_math_placement_test_california.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1826/4469/files/78079962655.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/5361/2182/files/15474139769.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4315/8166/files/88518905906.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_off00009279.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9279 5464 bytes
SHA-256: 599762a0e3052bcb54fb92196ce1bff56ff7251af0d52271ed721c567e881aa1
font_01_sfnt_off0000a4f4.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA4F4 10028 bytes
SHA-256: 75fe959a2bd149974141bac601106d1a28841f1d35bb0875f9942589b5729e04

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