Malicious PDF — malware analysis report

Static analysis result for SHA-256 81d9f4f4c3014547…

MALICIOUS

PDF

41.7 KB Created: 2020-08-17 02:41:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: e0f9a8fdb2c586e1ace6c7e0b78bf7ce SHA-1: a4f4ae99d705d92acf11f0e179f029a31108a71f SHA-256: 81d9f4f4c3014547cec81825a30812c5f881bc28662e39a6e791103aae905463
214 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious domain, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains a URL that appears to be a lure for movie downloads. The ML classifier strongly indicates maliciousness, and the overall structure suggests a phishing or scam attempt.

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://ttraff.cc/pify?keyword=anaconda+3+movie+telugu In PDF document text
    • http://files.empressreadings.com/uploads/1/3/1/6/131636872/64377.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/1/0433/6225/5013/files/40575702176.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0449/2935/1835/files/acute_coronary_syndrome_management.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/4647/8759/files/workday_hcm_training.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0944/1953/files/6293616943.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/3775/3501/files/8255964920.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/4054/6714/files/xifukunid.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1007/2481/files/utah_county_jail_inmate_search.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/6924/3553/files/37517179609.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3835/1255/files/basic_computer_skills_free_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5235/2156/files/descargar_certificado_de_secundaria.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
🗂 Part of campaign: empressreadings.com 4 samples

Related samples 7

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_off00005f2f.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x5F2F 5200 bytes
SHA-256: 617c97f5dbdb9d825be1f983bddb2ae2786fa2c2610b5f8e31a17c075eaee518
font_01_sfnt_off000070ca.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x70CA 13272 bytes
SHA-256: acaaaf4008e95135374bef794f751e568ac2a2f44b39df60c84bbd4f840b6044

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