Malicious PDF — malware analysis report

Static analysis result for SHA-256 c38984803979080b…

MALICIOUS

PDF

47.2 KB Created: 2020-08-07 20:12:17 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 77feab5515c5f21b21edf7c070723466 SHA-1: dbc17bb0c1554316307f5715f8346e998fa0dea8 SHA-256: c38984803979080b721d78753fb58293dff18cefceed00662b6b2959d2c3c1c5
194 Risk Score

Malware Insights

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

The PDF contains a link farm pointing to numerous external PDF files, with one specific URL identified as a malicious redirector. The document body, though heavily obfuscated, contains the malicious URL and text related to 'Anaerobias facultativas pdf', suggesting a lure to trick users into clicking the malicious link. The presence of a malicious redirector indicates an attempt to lead the user to a harmful destination, 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/pify?keyword=anaerobias+facultativas+pdf In PDF document text
    • http://files.cabaretatstudiob.com/uploads/1/3/1/4/131407227/5d0d5aa.pdfIn PDF document text
    • http://files.kashimondojo.com/uploads/1/3/0/7/130739831/jofekagot.pdfIn PDF document text
    • http://files.charlielavaroni.com/uploads/1/3/0/9/130969368/eafe4.pdfIn PDF document text
    • http://files.widehorizonsretreat.com/uploads/1/3/1/3/131381881/nalinetoxa.pdfIn PDF document text
    • http://www.ascendercorp.com/In PDF document text
    • http://www.ascendercorp.com/typedesigners.htmlIn PDF document text
    • http://www.daltonmaag.com/In PDF document text
    • https://cdn.shopify.com/s/files/1/0437/0133/8266/files/chaldean_numerology_for_beginners.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/6633/6167/files/ramulakuxoru.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/0179/1132/files/33607863350.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/8318/5832/files/lotipobivubap.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0448/0499/7271/files/convert_to_d_d_5e.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/9847/0552/files/bumakixu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/1403/7397/files/89725078822.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/kobigobadujuwa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/4423/9510/files/becoming_an_independent_security_consultant.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/0357/6481/files/89208099447.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4609/9349/files/78648904933.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_off000069b8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x69B8 5220 bytes
SHA-256: 4f710874a1d8cbfb3a852c95c89344491c981a598197952b88c2849e4553b960
font_01_sfnt_off00007b7c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x7B7C 11204 bytes
SHA-256: 46ba0d5fef5789db8ef8d8e98fe417dde78813609e7a479340493173776e77b7
font_02_sfnt_off00009fdb.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x9FDB 4324 bytes
SHA-256: cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34

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