Malicious PDF — malware analysis report

Static analysis result for SHA-256 0a2a3263697be4be…

MALICIOUS

PDF

50.8 KB Created: 2020-08-24 00:24:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 1ab6b92b01fe0fc170b2492d14fc248f SHA-1: 6e220e56ffdbb7baf309b45997fe076ab9e121de SHA-256: 0a2a3263697be4be79972026e20e12ab34d089fb4856a3faf13f313d34d1baf6
194 Risk Score

Malware Insights

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

The PDF contains a link that redirects to a malicious domain, disguised as a template for letters of recommendation. This is further supported by heuristics indicating a malicious redirector and a link farm, suggesting a phishing or scam attempt. While no scripts were directly extracted, the PDF structure and embedded links are indicative of a malicious document designed to lead users to harmful content.

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=letters+of+recommendation+template+for+students In PDF document text
    • http://files.littleacornsgodstone.com/uploads/1/3/2/7/132712127/df1be70fce1a408.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/1/0431/0820/4704/files/difurakumategorusebuf.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7707/4077/files/systemic_inflammatory_response_syndrome.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/7487/0689/files/lines_of_symmetry_worksheet_grade_5.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9161/6153/files/libros_de_instrumentacion_musical.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/9069/6597/files/kixelitumefedemefima.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5131/0488/files/ielts_general_training_writing_task_1_sample.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/3534/4539/files/senuxazudiludufin.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3902/3526/files/tamil_short_stories.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/0501/7253/files/36484089050.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/2574/4547/files/14381714124.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 1

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_off00008a16.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8A16 5240 bytes
SHA-256: 068466e99a1608c75803f2d6fda6c8ebfba3570533d98eee138eafd4c738b0fd
font_01_sfnt_off00009bd3.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9BD3 10212 bytes
SHA-256: 4a37e6e5bec53c5011414efb575d1897213402042b4762a3fba08ab141ad9c94

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