Malicious PDF — malware analysis report

Static analysis result for SHA-256 71e505ca326af9ed…

MALICIOUS

PDF

34.6 KB Created: 2020-08-12 15:48:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: cfc9b64be8afdc1c799e1751ab895c5d SHA-1: 94761d93a0793b0ca83f05c39bb596dfd8e841dc SHA-256: 71e505ca326af9edb1c7df5a913b3640b7acf73b7b1f56226961c88025be71b8
194 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with a primary redirector identified as malicious. The document body, though heavily obfuscated, contains the malicious URL and appears to be a lure for a free download. The presence of numerous links suggests a link farm or SEO poisoning tactic to distribute malicious content.

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=aday+%25C3%25B6%25C4%259Fretmen+kitab%25C4%25B1+2020+pdf In PDF document text
    • http://files.gmf.ch/uploads/1/3/2/7/132740723/gakemaliwan.pdfIn PDF document text
    • http://files.priscillabe.com/uploads/1/3/0/9/130969680/8686148.pdfIn PDF document text
    • http://files.boardgamebase.com/uploads/1/3/1/4/131406800/5803928.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/1/0432/6470/4662/files/dht11_start_condition_1_not_met.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8427/5109/files/lee_loadall_2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/8865/7051/files/virabudiginikugupej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7900/7384/files/alcoholismo_causas_y_consecuencias.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/4939/2030/files/buvemuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/1011/3188/files/anatomy_books_for_artists_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/69233027053.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5184/3737/files/bukizok.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/8938/7935/files/nutricion_antienvejecimiento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2388/3688/files/5239078689.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2807/7992/files/nirajuzajemomodofamutijak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5000/0791/files/65998256633.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_off0000456e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x456E 5948 bytes
SHA-256: 5111ba5743823384f08c630128a161d56a8159e19b64b25c384bfcd91e01c78a
font_01_sfnt_off0000596f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x596F 10940 bytes
SHA-256: 77c8047dae38a9dcb5b9d4ab0e5b248636490eb0c0db06449ed62f67eb94a72d

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