Malicious PDF — malware analysis report

Static analysis result for SHA-256 e6eb96608e0e38d2…

MALICIOUS

PDF

52.2 KB Created: 2020-10-28 11:49:55 +02:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-09-14
MD5: 5ac0adf763f3b8a7e4c19415e7fd63a7 SHA-1: 88afb454f5d4760de16da0977e2e92f149bede7b SHA-256: e6eb96608e0e38d2942ded602d1f4085748e40b0badbf34045cac24a415cf806
194 Risk Score

Malware Insights

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

The PDF contains numerous links to external resources, many of which point to redirector infrastructure. The primary redirector URL is `https://gettraff.ru/strik?keyword=allure+qs2+series+range+hood+manual`, which is flagged as malicious. This suggests a phishing or scam attempt, likely using the guise of providing a manual to trick users into visiting a malicious site.

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/strik?keyword=allure+qs2+series+range+hood+manual In PDF document text
    • https://cdn-cms.f-static.net/uploads/4365607/normal_5f8744203d5af.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4366043/normal_5f86f8c46aff0.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4378605/normal_5f97c1a96b5a2.pdfIn PDF document text
    • https://dufevirefat.weebly.com/uploads/1/3/1/4/131438490/peletoz.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4409113/normal_5f967a8f64c28.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4374371/normal_5f9540fd8fce3.pdfIn PDF document text
    • https://jarapitoxedomel.weebly.com/uploads/1/3/1/4/131437170/zutotekimip_medun_furetu.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4379842/normal_5f8f141990d48.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4391611/normal_5f926aa536766.pdfIn PDF document text
    • https://rizadubarezesul.weebly.com/uploads/1/3/4/4/134499036/towerajiva.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370764/normal_5f9122ddd615b.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4376606/normal_5f90524cd47b5.pdfIn PDF document text
    • https://cdn-cms.f-static.net/uploads/4370288/normal_5f925597ac57f.pdfIn PDF document text
    • https://zotadipijipas.weebly.com/uploads/1/3/4/4/134467791/313772.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/1/0429/6104/3605/files/84135598760.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0484/4306/4474/files/classification_key_worksheet_ks3.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4456/8220/files/algebra_1_eoc_practice_worksheets_texas.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_off00008d97.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8D97 5488 bytes
SHA-256: d0e1d53267625b93c1d5410762355f244c787f547996123b29b21d06f11edab9
font_01_sfnt_off0000a00b.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA00B 10580 bytes
SHA-256: 592038de3a43888cd9ecbebb4ffc95321d3037117122aeef42d8b9aa320fe427