Malicious PDF — malware analysis report

Static analysis result for SHA-256 9f8275a32e78b2fd…

MALICIOUS

PDF

53.8 KB Created: 2020-08-24 22:06:34 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: f8b00489ed99bb74b9f9a3a193b05379 SHA-1: 9832407787ba85a507b3a4b1405a338278f61fc5 SHA-256: 9f8275a32e78b2fdf6f245f34a24adc86945e8bff8539b7689e68841c13d403a
194 Risk Score

Malware Insights

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

The PDF contains a significant number of embedded links, with a critical heuristic firing indicating a link farm pointing to known malicious redirector infrastructure. The primary malicious URL identified is 'https://ttraff.cc/pify?keyword=best+calligraphy+guide+book'. The document body appears to be malformed or heavily obfuscated, but the presence of numerous links suggests an attempt to lure users to external, potentially malicious, sites. 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.cc/pify?keyword=best+calligraphy+guide+book In PDF document text
    • http://files.dance4him.org/uploads/1/3/0/8/130874668/8763813.pdfIn PDF document text
    • http://files.bettyjeansteinshouerbooks.com/uploads/1/3/1/4/131406841/jubabudikapad_kitepubake_sajuxoxuluniraj_dawuvemezogitu.pdfIn PDF document text
    • http://rowed.texasqualitybuildings.com/uploads/1/3/1/6/131637016/60777efd956d4.pdfIn PDF document text
    • http://wakifo.pos-thinking.com/uploads/1/3/2/7/132710773/fefubizun-tajoto-zajexi-woxunimokepu.pdfIn PDF document text
    • http://detatu.visionstheperformingarts.com/uploads/1/3/1/4/131437623/kakipakesukuxisidosu.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/1/0438/2860/9186/files/attestation_d_hbergement_campus_france_maroc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5193/3078/files/67098416293.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/1028/3931/files/napanotidok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6721/files/53608872742.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1778/9862/files/97408816591.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7390/4545/files/nike_platform_sneakers_mens.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1514/3587/files/3581295761.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4190/7100/files/rigagim.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/2560/3488/files/82642548170.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 6

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_off00009325.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9325 5692 bytes
SHA-256: f7b43aa39bbd7542a220ab773e28b4e3267ff493c0b0bf989a33e22a973b13c3
font_01_sfnt_off0000a67c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA67C 10128 bytes
SHA-256: a6ea034e3f1e703e367f651a251afd308e4e47f85be020101d457cb3ee095f13

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