Malicious PDF — malware analysis report

Static analysis result for SHA-256 4f9d18fe417624e0…

MALICIOUS

PDF

41.3 KB Created: 2020-08-15 08:21:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 7b5283bef9d7477b5aef37d3aa119de6 SHA-1: 210e5b82e6d1765eab1729a63139d427264d6fec SHA-256: 4f9d18fe417624e09200379e2e31fea73f22fcb060b6e65ba9d2aff6de3c1c65
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, many of which point to Shopify domains hosting other PDFs, suggesting a link farm for SEO manipulation. One critical heuristic identified a link to a known malicious redirector, ttraff.ru, which is used to lure users with a fake 'bubbles game apk free' download. This indicates a phishing or scam attempt leveraging a link farm to obscure the malicious destination.

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.ru/pify?keyword=bubbles+game+apk+free In PDF document text
    • http://files.holbrooktriathlon.com/uploads/1/3/0/8/130874284/885432.pdfIn PDF document text
    • http://molujiten.9footvoice.com/uploads/1/3/0/7/130776407/jirefegazasebun-wumonifuxu-dafuvonot-kegidijemasovad.pdfIn PDF document text
    • http://files.longnecklagooneec.com/uploads/1/3/0/7/130775856/7051484.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/1/0427/8976/5276/files/86908863006.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8421/8532/files/rojeduwupurene.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0486/2375/files/dusizoku.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9114/8444/files/wefilumuva.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7003/7917/files/visogijanobenutasimu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0925/2250/files/49067168551.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0690/2950/files/the_official_boyfriend_application.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/3708/2271/files/nibizesukese.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3440/2216/files/sap_pneumonia_pada_anak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/7797/3654/files/bexawavusezutukeg.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/regubaxakajo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5851/1510/files/maths_all_formulas_in_telugu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6310/6968/files/60180250524.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: windsweptwillow.com 3 samples

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_off0000641b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x641B 5476 bytes
SHA-256: 647ffa5aac9e908fe89f2d3bc1286af4ad930f8c394d96513288fb0d95a1871e
font_01_sfnt_off000076a5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x76A5 9884 bytes
SHA-256: 7c663aa96e2c906ae084ba75c9ab6d88281ff414582cbfd5e87adf2901a5bf64

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