Malicious PDF — malware analysis report

Static analysis result for SHA-256 171e5e2501605b58…

MALICIOUS

PDF

42.8 KB Created: 2020-10-31 11:21:02 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 0e222e417506ce70876a788499cd5ff6 SHA-1: e2f24b343488393f621433c07586d193b6972db3 SHA-256: 171e5e2501605b58afd44c8970b4c84c9cc825df8be74007854f1ad1b3261ba9
134 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains embedded URLs that point to a redirector known for malicious activity, specifically `https://ttraff.com/123?keyword=national+walking+day+uk`. This redirector is likely used to funnel victims to phishing or scam pages. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the presence of malicious redirector links indicates a phishing or social engineering attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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/123?keyword=national+walking+day+uk In PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/1680053.pdfIn PDF document text
    • https://rigonabex.weebly.com/uploads/1/3/1/4/131483185/8285355b375.pdfIn PDF document text
    • https://fodezamu.weebly.com/uploads/1/3/1/4/131407453/devuxupujikeninaferi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4377662/normal_5f8a4e17445fb.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/1/0266/7941/0862/files/punctuation_worksheets_for_class_2_cbse.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/2468a653-3aed-4a73-9155-f6f3d8ba0064/mxr_skyrim_mod_list.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4399/5298/files/70072428563.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0508/1605/7529/files/tijekejezupevapiwudag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/2449/0397/files/portland_trail_blazers_live_stream_free_reddit.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/bc434af7-e518-4a4e-a0e8-b72e4ce60753/zebiwedaminipugilukifup.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066dd.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x66DD 4944 bytes
SHA-256: 5d8ca45a325607bd0b3e7273fb08caee56a5728debff83bed4aa437573bd8390
font_01_sfnt_off000077e2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x77E2 11840 bytes
SHA-256: 76b07e4467ec2a13a7cb1f8e47403291b63fcbaf04341f5cdbac444a8e3ec75c