Malicious PDF — malware analysis report

Static analysis result for SHA-256 31b264b9c6efbbf0…

MALICIOUS

PDF

40.4 KB Created: 2020-10-09 05:18:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-17
MD5: 3722a26cd84f9929cc4713225f7d75df SHA-1: 7d03983a9d5e054561664d41644075320cad9d68 SHA-256: 31b264b9c6efbbf0b135ce620d3accf7628c8426b4356a0ced6e75cb9d857aee
194 Risk Score

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://gettraff.ru/pify?keyword=boeing+767-300+united+interior In PDF document text
    • http://zebufod.newarkfriary.org/uploads/1/3/0/7/130740178/lufeguwuxeweri_ximikiv_dupaduw_nusunarure.pdfIn PDF document text
    • http://files.simplybebodywork.com/uploads/1/3/0/7/130740084/parajifebaf.pdfIn PDF document text
    • http://dokevi.uccbaycity.org/uploads/1/3/1/3/131378898/a95211a0b17e6e2.pdfIn PDF document text
    • http://kovobisa.buffalovalleypuppies.com/uploads/1/3/0/7/130775478/358e5aa54812e.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/1/0487/0055/5414/files/juzuvamefan.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8531/5739/files/76744768349.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/6055/0046/files/kim_addonizio_first_poem_for_you.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0499/3096/1054/files/fopuvo.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/6251/2802/files/transmission_speed_sensor.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0266/8167/1872/files/71335854918.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/5661/3544/files/madonna_like_a_prayer_lyrics_meaning.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/3515/9456/files/chief_jay_strongbow_wwf.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/d4a7f942-2a5d-48d2-8a67-256de2b86016/puvomupu.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/27f22787-dbff-412f-ac9f-1281550506a3/15809220533.pdfIn PDF document text
    • https://uploads.strikinglycdn.com/files/c693eb91-fba1-4c82-b201-52d1935df146/xuvobamaxigaxir.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_off00006099.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6099 5196 bytes
SHA-256: c58e01d67a4584d76875bb1b65258ac00c9bbd9e0ccbe620da5644510d7bc492
font_01_sfnt_off0000726c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x726C 10412 bytes
SHA-256: a4c8dcbe426cec16254aadcd43672be8c9745d2f125cd752967d073873f62569

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