Malicious PDF — malware analysis report

Static analysis result for SHA-256 c48e71401d8edc73…

MALICIOUS

PDF

43.3 KB Created: 2020-08-05 11:51:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 60d5f7cfce70f1a876a94f9322b17dfc SHA-1: 6498db6f8d92eb31a1637b19b7525f9aea1cb95b SHA-256: c48e71401d8edc735ec6b916d4d02fc001e9b1730a0944ac3a17512dd01e686a
194 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to external PDF files hosted on various domains, including a known malicious redirector. The primary redirector URL is 'https://ttraff.cc/pify?keyword=hsc+biology+textbook+pdf+download', which is designed to lure users into downloading content under the guise of a free textbook. The document body, though heavily obfuscated, contains references to the textbook download lure and the tool used to generate the PDF.

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=hsc+biology+textbook+pdf+download In PDF document text
    • http://fazifuvu.steadfasttattoostudio.com/uploads/1/3/0/7/130739826/48976370.pdfIn PDF document text
    • http://kexekula.fredericpissarrousa.com/uploads/1/3/1/8/131856161/7078693.pdfIn PDF document text
    • http://files.myerk.org/uploads/1/3/0/9/130969889/debuvinoxod_nekota_lumeka.pdfIn PDF document text
    • http://files.jilldfitness.com/uploads/1/3/1/4/131437515/56a73a7724ff1.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/1/0428/4055/5687/files/33399738059.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7193/8461/files/18433745780.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1218/5499/files/26358240915.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0101/1614/files/24418797365.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/vewurobafug.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4694/5436/files/fisefurejosazasedumuneji.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3446/8774/files/nivem.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0446/0858/5891/files/how_to_know_higher_worlds.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3622/9278/files/pixifejunetokerizalupaluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7353/6149/files/bokeretakedosuzirenaj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6263/2360/files/bolarotuzos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4533/6726/files/48364343643.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 5

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_off00006ab5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6AB5 5652 bytes
SHA-256: 25a584772b7c3e7411ba30ea06bf5f0347cb3ef736d81963efc74846e6eef395
font_01_sfnt_off00007e27.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7E27 9964 bytes
SHA-256: 1978b78ccf22895508ba909237654904a9c48678cdd6addd2ead2a92cfebf967

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