Malicious PDF — malware analysis report

Static analysis result for SHA-256 1f7db25a92c2e13b…

MALICIOUS

PDF

41.7 KB Created: 2020-08-19 13:32:39 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 5339c80dd849a1336ecefe4500161c49 SHA-1: 27c5dd3c89efef7995453ce1958abccc24cc31af SHA-256: 1f7db25a92c2e13bb763de352647c59e8ce1167bb2fb16f4b3ac13d754ecb25e
194 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains a URL that matches the redirector link, suggesting a lure to a malicious site. The presence of many external PDF links also indicates a link farm, likely for SEO poisoning or traffic redirection.

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=wild+animals+name+list+with+picture+pdf In PDF document text
    • http://files.chg-advisors.com/uploads/1/3/1/6/131636984/texaxejipifuset-dojukesugegusap-fudekuvogabosu-fibubu.pdfIn PDF document text
    • http://files.clevelandhousepainters.com/uploads/1/3/2/3/132302718/nizusumad.pdfIn PDF document text
    • http://files.kungfuabq.com/uploads/1/3/0/8/130874286/ff39132332.pdfIn PDF document text
    • http://files.casamaxi.com/uploads/1/3/0/8/130814644/kijis.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/1/0428/0687/0183/files/70702032498.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6954/6395/files/sovumugewogusaxogutixot.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4116/9309/files/berger_colour_catalogue_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0184/5659/files/elements_statistical_learning_hastie.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/2559/6573/files/ditenamazi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0452/1220/5216/files/labaraxazinovivil.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/2754/5755/files/jukatonobulir.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/1841/5254/files/63536712951.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/3538/9086/files/grow_taller_after_puberty_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/3993/1038/files/sabex.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 7

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_off00006489.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6489 5500 bytes
SHA-256: 78b46e47afcb740e4ef948527b788ab92a3b488825b08db5eb08b4cde08571f2
font_01_sfnt_off00007727.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7727 10288 bytes
SHA-256: a74fc1dbb49bc6de3af480d40ab5459d982f6dff625a5bf1ccbd60f60b151eb8

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