Malicious PDF — malware analysis report

Static analysis result for SHA-256 df4cc35692f8a95a…

MALICIOUS

PDF

51.2 KB Created: 2020-09-28 17:38:33 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-07
MD5: 03388a4154b625fe272e5755cfdc9b94 SHA-1: 9d691a74734e724b3e63cdf62cd87159c6bea599 SHA-256: df4cc35692f8a95a0405019e164dd4f71f7d4041d5f8ce4375546485053809a1
194 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://cctraff.ru/mozel. The document body, though heavily obfuscated, contains text related to 'ctet 2019 official notification pdf', suggesting a lure. The presence of a link farm heuristic further indicates malicious intent to drive traffic to potentially harmful sites. No scripts were extracted from this sample.

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://cctraff.ru/mozel?keyword=ctet+2019+official+notification+pdf In PDF document text
    • http://files.mrbuker.com/uploads/1/3/0/7/130775677/4680a1c963f0.pdfIn PDF document text
    • http://files.trailmedal.com/uploads/1/3/1/3/131380814/8a5344e.pdfIn PDF document text
    • http://files.ponderingcat.com/uploads/1/3/1/3/131384429/4dfa0ac6ee05.pdfIn PDF document text
    • https://site-1037086.mozfiles.com/files/1037086/93700916381.pdfIn PDF document text
    • https://site-1037138.mozfiles.com/files/1037138/81042121950.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://fedorahosted.org/lohitIn PDF document text
    • https://cdn.shopify.com/s/files/1/0483/7100/7637/files/pokemon_platinum_action_replay_codes_rare_candy.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/5038/6079/files/my_boy_apk_download_for_pc.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6816/1176/files/south_of_the_border_west_of_the_sun_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3251/8555/files/79223091665.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/6604/8165/files/31598465372.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/0119/2352/files/finding_percentages_of_amounts_worksheet_year_6.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5535/7852/files/27681942507.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 8

Ranked by shared artifacts, heuristics, extracted URLs, CVEs, and signatures.

Full JSON: related samples API

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00007aa6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7AA6 5260 bytes
SHA-256: 4dc672489a8803098cc5641c7e4a85ec2c99b8289ebd064c03bd4b35b410f741
font_01_sfnt_off00008ca7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x8CA7 10768 bytes
SHA-256: 96a88b24f5e8b21db844f0f5b73a513cbfa077f02fd36ae4e79bb070405dbf3b
font_02_sfnt_off0000b170.bin pdf-font-stream PDF embedded font (sfnt) at offset 0xB170 3776 bytes
SHA-256: fd9508b8a355b1dcf0ac53030005f079175ab5094d68ae1ef1f8d7d2fbf45dbc

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