Malicious PDF — malware analysis report

Static analysis result for SHA-256 a564edd8041893da…

MALICIOUS

PDF

45.9 KB Created: 2020-08-05 06:31:05 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5fa20d91a9cd03df47f392ef2917635d SHA-1: 2d2270d3aa54cfa46639e15060dc37bc47857005 SHA-256: a564edd8041893da6b74e859485bc77736681ae03eac45879cec9ac720e06fb1
194 Risk Score

Malware Insights

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

The PDF file contains multiple embedded links, with a critical heuristic firing indicating it's a malicious redirector. The primary malicious URL identified is `https://ttraff.com/pify?keyword=annex+10+pdf`. The document also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on Shopify, likely to obscure the malicious intent and improve search engine visibility. No scripts were extracted, and the document body was largely unreadable binary data, but the presence of the redirector link is sufficient evidence of malicious intent.

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=annex+10+pdf In PDF document text
    • http://files.threecreekaussies.com/uploads/1/3/2/7/132710655/sujut.pdfIn PDF document text
    • http://files.tracysistercity.org/uploads/1/3/1/1/131164476/6674535.pdfIn PDF document text
    • http://files.greeceadventuretrips.com/uploads/1/3/0/8/130814460/sasilik.pdfIn PDF document text
    • http://files.scollingsworthenglish.com/uploads/1/3/0/8/130813511/tikomarirosuvemafir.pdfIn PDF document text
    • http://files.lehoangbichphuong.com/uploads/1/3/0/8/130873894/wobesaritaniwus_wimevezozobos_nivesemapuruke_gufejin.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/1/0430/3978/5111/files/63419428706.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6539/9713/files/xudisuzobuxezoxanojefupu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/jitukijubig.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0876/0735/files/53440871886.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7778/8057/files/plutie_irisa_ffxiv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/2201/4870/files/nituxexegabumomudagozesum.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xibirinadinabamagumib.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3417/1800/files/rekewozasixumalakoteli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0066/8065/files/39123559550.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/gumatuzonew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8909/1989/files/81751148295.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3387/8940/files/juzagekupakavewadefo.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_off00006ba2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6BA2 4772 bytes
SHA-256: c6e36757ef8dcd2ec1a617f160d4579739728c47aea6ebab131688d2f3625465
font_01_sfnt_off00007c04.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C04 14564 bytes
SHA-256: d0024c24a5f3e3fb31dc2c7021725de16407737cc6ccb5c0561cc5f6445f1f51