Malicious PDF — malware analysis report

Static analysis result for SHA-256 1926c7b7ea84f147…

MALICIOUS

PDF

37.7 KB Created: 2020-08-12 17:22:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-09
MD5: b7c94ad310bef9965ccf9947713de9dd SHA-1: b4afdf9da5d87962f2ba3b5106bdd3465873ea61 SHA-256: 1926c7b7ea84f147f3ff9322cccad3cde5c6c1952da1b2f3b069f738c4d75936
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF file contains numerous links, many of which point to a redirector service known for distributing malicious content. The primary redirector URL, 'https://ttraff.ru/pify?keyword=canasta+b%25C3%25A1sica+y+calidad+de+la+alimentaci%25C3%25B3n+en+m%25C3%25A9xico+pdf', is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, suggesting an attempt to lure users into clicking through to potentially harmful sites under the guise of providing PDF documents.

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=canasta+b%25C3%25A1sica+y+calidad+de+la+alimentaci%25C3%25B3n+en+m%25C3%25A9xico+pdf In PDF document text
    • http://files.armenianchurchofaustin.net/uploads/1/3/1/4/131438567/4212295.pdfIn PDF document text
    • http://files.allenpc.org/uploads/1/3/1/4/131437532/temukalugag-numogagix-faxuwipatojilu.pdfIn PDF document text
    • http://files.jordydeleon.com/uploads/1/3/2/6/132696558/e648132db.pdfIn PDF document text
    • http://files.accountinguci.com/uploads/1/3/0/8/130873907/wafizelov-josekijaze.pdfIn PDF document text
    • http://kumuwujiv.bleakhilllincolnlongwools.com/uploads/1/3/0/8/130814297/3580559.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/1/0431/6259/9583/files/4438896869.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/4626/3201/files/dikezasanelebudizamivu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/0545/1174/files/brain_teaser_interview_questions_and_answers.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/ufc_gym_sacramento.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/9380/2646/files/8736613660.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0428/7243/8947/files/18593414232.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0443/1645/9164/files/what_s_so_amazing_about_grace_download.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/godiden.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8047/4014/files/effect_of_online_advertising_on_consumer_buying_behaviour.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7764/0092/files/60856100333.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0435/4693/5445/files/lugifepenisuwu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0436/1977/8720/files/dozajatubenamafa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7899/1520/files/66620595534.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/3631/0678/files/juwexuxadikabuni.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

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x51C6 5932 bytes
SHA-256: c0660cf9d9a65378bf3790fe7d804b68f6f70f7f4ee965fdd1eb7f137d31d88b
font_01_sfnt_off000064c6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x64C6 10280 bytes
SHA-256: 67064dd90bacceb9d9555369bc3571d2d0e10bf79acf40e77d6ffe6552bfab2c