Malicious PDF — malware analysis report

Static analysis result for SHA-256 1df83d53a5c62f0f…

MALICIOUS

PDF

54.0 KB Created: 2020-08-08 13:28:35 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ce905ab75c2070ac92e5236266c02b4e SHA-1: 20bfbdec7bfa29a2ba569026fe287ea7dde4687f SHA-256: 1df83d53a5c62f0fa0584f4da6b39c3b9fd8fb2088474b5f9221f23fb2090c48
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a mass external link farm and a specific redirector link pointing to known malicious infrastructure. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are part of this link farm, suggesting a phishing or scam attempt to redirect users to malicious sites.

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/wb?keyword=neomag%20skurcz%20ulotka%20pdf In PDF document text
    • http://files.enfieldrefugeewelcome.org/uploads/1/3/1/4/131453733/jawijamelatev.pdfIn PDF document text
    • http://ziperat.everythingmotorcyclerider.com/uploads/1/3/1/4/131407089/zuzigo_turujixaluba_zuxemoxotil_jopezasubetivaz.pdfIn PDF document text
    • http://lopaxitik.one-sixteenth.com/uploads/1/3/1/3/131379730/pomox-vawet.pdfIn PDF document text
    • http://files.nducuwangugi.com/uploads/1/3/0/9/130969555/gimuviri-megatanizus-selusifo.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/1/0427/7973/8278/files/nitaninejenodenapuze.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/7708/2017/files/outlook_365_won_t_open.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6037/9286/files/55403964111.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/9325/3526/files/pugixivajoluw.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/9431/9009/files/ziravusilej.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/7259/4844/files/48274030944.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4077/6093/files/mokapodufigosilasirid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2492/5351/files/fleck_5600_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/4622/4551/files/fojebage.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/2108/9444/files/digital_character_development_theory_and_practice.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/37273581822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/9401/6157/files/47771965423.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4136/5922/files/blossoms_of_the_savannah_questions.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
    • http://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007c0a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7C0A 5560 bytes
SHA-256: be96271ccf7377db24f14b572972c264b793747938d7c0bd1c87c357e7b6422a
font_01_sfnt_off00008ef1.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8EF1 11468 bytes
SHA-256: 7a63821b0bf696738786f97c521a1c39b9b784fe9983a65289b6b2e94946004c
font_02_sfnt_off0000b3b2.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB3B2 16312 bytes
SHA-256: 028dbaa76d48ae99b02248bacea50134e27ed131f5dd39e25ac401de8961e19b