Malicious PDF — malware analysis report

Static analysis result for SHA-256 a525be247246f879…

MALICIOUS

PDF

70.9 KB Created: 2020-10-14 18:02:26 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-19
MD5: f0b0e075efb8a4bf3ec0bb446339a98c SHA-1: 56f0d2e72cbb61630172cf17e0fe4b99a694409d SHA-256: a525be247246f8795535b84b5bd4cfb23e8a10ae83fde088ba44af487717bfe0
214 Risk Score

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 6

  • 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.
  • Callback phishing phone lure medium SE_CALLBACK_LURE
    Document asks the user to call a phone number in billing, refund, subscription, fraud, or security context — consistent with callback phishing or tech-support scam patterns. Suppressed for legitimate-issuer (IRS/gov/official-form) or Microsoft license-boilerplate documents that carry no urgency or charge/dispute escalation.
  • 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=glipizide+davis+plus+pdf In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365580/normal_5f871231d2835.pdfIn PDF document text
    • https://dutitujazekap.weebly.com/uploads/1/3/0/8/130814390/kadijamiruvinugeno.pdfIn PDF document text
    • https://fijojonibiw.weebly.com/uploads/1/3/2/6/132681787/7922058.pdfIn PDF document text
    • https://genigudepa.weebly.com/uploads/1/3/1/0/131070712/6023986.pdfIn PDF document text
    • https://vuxozajuje.weebly.com/uploads/1/3/1/3/131379873/7d7b6617ab8.pdfIn PDF document text
    • https://jakedekokobara.weebly.com/uploads/1/3/1/3/131381480/divili_dapixi.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366032/normal_5f86f43edc9a9.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365582/normal_5f870b89540f1.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365552/normal_5f86f7560123d.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366027/normal_5f86f9279cca6.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4365553/normal_5f87043c04e7e.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366335/normal_5f87119b2c630.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/1/0484/6629/6986/files/ranoguvaxaxejak.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/0872/3614/files/david_pawson_unlocking_the_bible.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9517/3541/files/22513023050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0496/7065/2061/files/study_guide_earth_science.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/4118/6215/files/excuses_be_gone_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0485/9238/8261/files/29467672599.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0497/8979/6513/files/28492888577.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000d47d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xD47D 5080 bytes
SHA-256: 4b4202967f60b1e212522f64d40dfcca73f78816bed6e11d2c23606486c4c466
font_01_sfnt_off0000e5f5.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xE5F5 12328 bytes
SHA-256: 7cb4d25813f3795e693bf91ee3446b18eacaa004c862da52bcfdefb8e0d8f384