Malicious PDF — malware analysis report

Static analysis result for SHA-256 7cbdc93e98a5f628…

MALICIOUS

PDF

43.3 KB Created: 2020-08-23 19:44:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 833637f3b95e12fda9e70fb3d79b8bad SHA-1: 7e096fdd9bf232c7c07e34055ffe94d6203cce01 SHA-256: 7cbdc93e98a5f628fa8e20c194764bfc39adf9d09dba89b05c035b8e3c507f8e
254 Risk Score

Malware Insights

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

This PDF document contains numerous embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains text suggesting a lure for a 'cryptography lab manual pdf' and includes the malicious redirector URL. The presence of a malicious redirector and the lure indicate an attempt to lead users to malicious content, likely for phishing or malware distribution.

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.
  • Recovery secret / private key request critical SE_SECRET_RECOVERY_LURE
    Document requests recovery phrases, private keys, backup codes, or saved passwords. Requests for these secrets in a document are high-risk.
  • 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.cc/pify?keyword=cryptography+lab+manual+pdf In PDF document text
    • http://files.spracklenpainting.com/uploads/1/3/1/3/131379699/4311204.pdfIn PDF document text
    • http://files.millenniagraphics.ca/uploads/1/3/1/4/131437233/8602886.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/1/0462/7234/8309/files/apple_buyers_guide_ipad_pro.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0439/0807/1576/files/komoximuz.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4169/2567/files/periodic_table_hd.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/zotogobujadafozafinuv.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/9619/3686/files/77517439056.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/cell_theory_reading_worksheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/8762/4344/files/50645515395.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/7599/3764/files/rodumijew.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0846/6845/files/2005_honda_accord_manual.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/45927795399.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/7396/1125/files/wubovokade.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/4178/3959/files/nozogufotasaxedisi.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/8851/1130/files/82891937972.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5848/7703/files/mezetexoseviluj.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/5331/8306/files/brexit_withdrawal_agreement_text.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 4

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_off00006b65.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x6B65 5424 bytes
SHA-256: f869670dfeeb2fc3cc6baddd56adcd137c22377924d4b5de9546bc22ed46d054
font_01_sfnt_off00007db6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7DB6 10236 bytes
SHA-256: 2e6a69e3beef16804a2afa2b8927a65775672f9a3de76bf6694ee5ebd9a46d09

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