Malicious PDF — malware analysis report

Static analysis result for SHA-256 1a3a5a534923721a…

MALICIOUS

PDF

35.6 KB Created: 2020-08-10 13:33:10 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4e05bf91aa28d680a289d9f13574872c SHA-1: 3764b394a1bab50f2d31273ecbcd99948de5a0e3 SHA-256: 1a3a5a534923721abaccec80e7f1d3f24165fdb5007b838f6011ff58153f292b
194 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, with one identified as a malicious redirector. The heuristic PDF_MALICIOUS_REDIRECTOR_LINK indicates that the link at https://ttraff.com/pify?keyword=birdland+weather+report+sheet+music+pdf points to known malicious infrastructure. The PDF_SEO_LINK_FARM heuristic further suggests that the document is part of a link farm designed to distribute malicious content. No scripts were extracted from this sample.

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=birdland+weather+report+sheet+music+pdf In PDF document text
    • http://files.alissaroca.com/uploads/1/3/1/3/131384777/wuluwute.pdfIn PDF document text
    • http://files.katherinewolff.net/uploads/1/3/0/8/130814043/bixadiziruxoranum.pdfIn PDF document text
    • http://files.alexandrabischoff.com/uploads/1/3/1/1/131163932/1608275.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/1/0434/3280/4504/files/97900093966.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9241/8468/files/ecocardiograma_transtoracico.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6152/7206/files/alto_saxophone_pentatonic_scales.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/1799/3366/files/56659219416.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/oxford_picture_dictionary_second_edition.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5680/8607/files/21460789209.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5353/9747/files/vulvovaginitis_por_candida_albicans.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0203/5354/files/pisulemavu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6020/8540/files/bitsat_question_papers_2020_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/9559/5938/files/siterekotezixiboda.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
🗂 Part of campaign: alissaroca.com 3 samples

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004be0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4BE0 5536 bytes
SHA-256: b130e3b0fa347b70050a59141c867dc7f1a6f228dc068fab914d80e1e58cadde
font_01_sfnt_off00005e8e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5E8E 10304 bytes
SHA-256: 050d6ab1e7d320996992cfe8722280f74c47f1cdbd2abe8e9cdd6e69ae087c31