Malicious PDF — malware analysis report

Static analysis result for SHA-256 7fff87e735751fb3…

MALICIOUS

PDF

57.4 KB Created: 2020-08-29 04:31:41 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 49da19c04e8e97a31a8018fb5d18eebd SHA-1: 7d142f501f77593cb75544021749fd42a68bfe8e SHA-256: 7fff87e735751fb3f76b96f9e6a5782944a9a06bbe87fb5e29ec7c35f1f21e44
194 Risk Score

Malware Insights

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

The PDF contains numerous links, with a critical heuristic identifying a redirector to a malicious URL. The document body, though heavily obfuscated, contains text suggesting it is a lure for 'Padi open water diver manual answers 2015'. The presence of embedded URLs and the ML classifier's high confidence score indicate malicious intent, likely for phishing or malware delivery.

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/wix?keyword=padi+open+water+diver+manual+answers+2015 In PDF document text
    • http://fontawesome.iohttp://fontawesome.io/license/In PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.thdl.org/http://www.thdl.org/TibetanIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1842/8326/files/kigajed.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7997/4556/files/46349387128.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/6023/0294/files/character_certificate_format_for_job_doc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7034/0772/files/zuxatexipetinirodisido.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7142/9015/files/makalah_metabolisme_protein.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_681f2cc7fc5c4ddc8bff164975e67588.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_5dac4b4bd9f741ab8b2ab39a188db7e5.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_7a738bd1569b4c1b8ac1690591a78efb.pdfIn PDF document text
    • https://static.usrfiles.com/ugd/b8c837_0cbcd5cb10574ca2ac8613995d8126b2.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5276/9192/files/41906010649.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/85303729953.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4194/5760/files/18391830737.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3057/6295/files/60455219242.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6796/4580/files/89088432830.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0183/9775/files/tamubalokupul.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://www.gnu.org/licenses/In PDF document text
    • http://www.gnu.org/copyleft/gpl.htmlTibetanIn PDF document text

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000860d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x860D 1644 bytes
SHA-256: 162c0a010de815b7113e95042773df5ff206858396d732a2cab15c40ed542f26
font_01_sfnt_off00008e31.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8E31 5708 bytes
SHA-256: 8cac0874ffd353aba8089b1c7bb93653582db5987e3ce1f915129dd5780aec91
font_02_sfnt_off0000a1a6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xA1A6 8976 bytes
SHA-256: 2df30c64b97ccb2843abf29c5a8ff3ba720237445e9a583b0b2f07585fdb381c
font_03_sfnt_off0000b36a.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB36A 10740 bytes
SHA-256: 2575e0706b929a4ebd8c72f36c78e8c91312c7322419a228d285bf52ada65f19