Malicious PDF — malware analysis report

Static analysis result for SHA-256 6da77771d7452691…

MALICIOUS

PDF

47.0 KB Created: 2020-08-20 23:55:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: c7be5dbd011e47f5bc9a739c4b576244 SHA-1: 48057e51d4c79cb9617e109025204a62ceaee698 SHA-256: 6da77771d7452691cf96a713a6d69804ee732dbf9e01932db3996d90bacb208c
194 Risk Score

Malware Insights

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

The PDF contains numerous links, many pointing to a redirector service, indicating an attempt to drive traffic to malicious sites. The ML classifier strongly flagged this PDF as malicious, and heuristics confirm it acts as a link farm and redirector. The document body, though heavily obfuscated, contains a URL that matches the primary redirector, suggesting the document's purpose is to facilitate user redirection to potentially harmful content.

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.com/pify?keyword=mobogenie+android+8.+0 In PDF document text
    • http://pagake.sherrisdancecenter.com/uploads/1/3/2/3/132302780/8249209.pdfIn PDF document text
    • http://files.bellairecapital.com/uploads/1/3/1/4/131407469/5527766.pdfIn PDF document text
    • http://files.labellavitaitalia.com/uploads/1/3/0/7/130739783/bosazazawo.pdfIn PDF document text
    • http://vatajopav.jerseycarpets.com/uploads/1/3/1/4/131438344/7767250.pdfIn PDF document text
    • https:///plus.google.com/communities/107051382501457940803//plus.google.com/communities/107051382501457940803In 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/1/0430/6832/6042/files/binary_to_gray_code_conversion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/5497/9477/files/30618299509.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9878/3382/files/odisea_homero_gredos.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/5216/3481/files/loxobamarunofogomatanis.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/1700/2405/files/remove_metadata_from_mac.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/8359/4917/files/arduino_coding_tutorials.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/6641/6549/files/91662235651.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/2926/5564/files/98660282440.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/3728/4762/files/gurupe.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/5143/3627/files/sociological_concepts.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/3158/5180/files/fakav.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8625/9100/files/43237850409.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0438/1055/4013/files/sumilixetupa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/6737/4758/files/75996693640.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://dejavu.sourceforge.netIn PDF document text
    • http://dejavu.sourceforge.net/wiki/index.php/LicenseIn PDF document text

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000062d7.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x62D7 5296 bytes
SHA-256: 510370390e67f33f175938ffd69142a658da46e18c19be05c510dc66a14d08bf
font_01_sfnt_off000074f0.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x74F0 10744 bytes
SHA-256: 42a97f617572f0a32ca4740190b7caf695da010c590864c2a92cb7c50430179a
font_02_sfnt_off000099d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x99D6 16092 bytes
SHA-256: 9af6fc3bf9d751f70540aea0fa47faa159a3604992cda23d2adcda3ffc5346b2