Malicious PDF — malware analysis report

Static analysis result for SHA-256 8248f261f2a5ec10…

MALICIOUS

PDF

47.0 KB Created: 2020-08-03 15:15:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1d86923f9210d82d9c3ae5f8f7108a48 SHA-1: b5e32bd8fc9a2c7935f0b473ce4ade293c583ea2 SHA-256: 8248f261f2a5ec102ae28c36b5fc2a2f57759bacd689a032049154e0d7aa29da
194 Risk Score

Malware Insights

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

The PDF contains multiple heuristics indicating it's a malicious redirector and part of a link farm, designed to lure users to malicious infrastructure. The embedded URL 'https://ttraff.cc/wb?keyword=vocalise%20piano%20trio%20pdf' is flagged as a known malicious redirector. The document body, though heavily obfuscated, also contains this URL, suggesting the primary purpose is to drive traffic to this malicious site, likely as part of a phishing or malware distribution campaign.

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/wb?keyword=vocalise%20piano%20trio%20pdf In PDF document text
    • http://files.magicstorybooks.com/uploads/1/3/0/7/130776131/5d97c.pdfIn PDF document text
    • http://xinaro.antoinegindt.com/uploads/1/3/1/6/131606407/2789563.pdfIn PDF document text
    • http://files.kendramccartney.com/uploads/1/3/0/7/130776485/5392179.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/1/0430/5905/2706/files/93455550747.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7321/6411/files/gajavugoledevalawa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/0427/8422/files/jetugenukarixofukako.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1262/0447/files/niborululin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6464/6040/files/kindle_fire_1st_generation_root.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pisanebemewamabojesodid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4028/5607/files/30640717721.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1734/6982/files/rebopivatatevavetezevapog.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1304/4386/files/sezevasevekepagilag.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/mateb.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0620/5857/files/g-_unit_beg_for_mercy.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 2

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_off00007927.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7927 5116 bytes
SHA-256: 4644e25cc4ee4688b4ead9f78b41ec62815a8f7e5f6f115ddb4da9aea012201b
font_01_sfnt_off00008aa1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8AA1 10716 bytes
SHA-256: f88d103b5b0247c14ac126b6bda6a6a3138e28b84dac18f7246dd75005b4dbc3

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