Malicious PDF — malware analysis report

Static analysis result for SHA-256 e1811919e84d6b30…

MALICIOUS

PDF

45.0 KB Created: 2020-08-21 09:46:38 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: ba9703bf75a6066357ca28e9730fa936 SHA-1: 6f8b1b174ca1f9ba886ef389ec745a10887bd18f SHA-256: e1811919e84d6b30ec26facd57c917272fa2835c9ff5d0a37a8bbb18220d340a
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The document body, though heavily obfuscated, contains the text 'Android studio course duration' and the malicious URL, suggesting a lure to a phishing or malware distribution site. The presence of numerous PDF links, including the malicious one, indicates a link farm strategy to improve search engine ranking and distribute malicious 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.com/pify?keyword=android+studio+course+duration In PDF document text
    • http://ravojidi.bibliognostic.com/uploads/1/3/1/4/131406532/zutan.pdfIn PDF document text
    • http://lelog.gracesaunders.com/uploads/1/3/1/3/131380086/nolisefadanexu-pijafej-puxitejomegag.pdfIn PDF document text
    • http://files.gracehouseministry.com/uploads/1/3/2/6/132695280/jofinepuda.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/1/0433/9151/6826/files/mebosatujilam.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/6079/6318/files/98437083339.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0755/8310/files/75500462195.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/6810/4602/files/41680926921.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4795/2294/files/wibeli.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/5401/3336/files/95230405501.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/1421/8143/files/kerukexifab.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 5

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_off00007348.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7348 4888 bytes
SHA-256: fbb52bad8e91ebda532e56e0441cb498ee86655abac7f7dc58af7543769d2ced
font_01_sfnt_off000083e9.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x83E9 10328 bytes
SHA-256: 4d14df22f1f0818299ee221effb2a0a1f3f56c7a652dea2a84292577ad3c24ba

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