Malicious PDF — malware analysis report

Static analysis result for SHA-256 83bca1a306d561f1…

MALICIOUS

PDF

41.9 KB Created: 2020-08-22 12:40:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 4a0515784f6388ee4bfb489f038d53e5 SHA-1: ff7e43d94424f1a356cd7011aa92023980831616 SHA-256: 83bca1a306d561f1caecb527c004acd4e7ab2067f18b74ba79b41ef25aa99ec2
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains multiple links, including one to a known malicious redirector at ttraff.com. This redirector is likely used to obscure the final destination, which is probably a phishing or malware distribution site. The document body and embedded links suggest a lure related to 'piano sheet music' to entice users to click the malicious link.

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=flaws+bastille+piano+sheet+music In PDF document text
    • http://files.estellegourmet.com/uploads/1/3/2/8/132815748/4c5d492e7.pdfIn PDF document text
    • http://files.egyptianreiki.com/uploads/1/3/0/7/130740624/waruw_sixovenesup_fewifirigupo_vafabu.pdfIn PDF document text
    • http://pefazul.minxiejewelry.com/uploads/1/3/2/6/132695829/virunapederawux-ximiwizuda.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/1/0437/4141/3527/files/48849660396.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0434/4764/8412/files/61927911767.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0440/4704/0662/files/94086702970.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/7990/1079/files/potozebibu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/cinderella_solution_book.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/4674/7803/files/23700538912.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/8630/6710/files/wonadirolavibisa.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0432/7643/5612/files/free_formal_letter_template_uk.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0450/8644/1637/files/90666670775.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0462/5255/6437/files/gush_etf_fact_sheet.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0441/1532/9176/files/extend_photoshop_trial_2019.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

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_off00004f62.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x4F62 5264 bytes
SHA-256: f60d8e9e0b9e87b1df1a9ece84656decb87d8c423be7d694f7ff94bcbfb9602f
font_01_sfnt_off0000612c.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x612C 10592 bytes
SHA-256: 77054d383db95ab706754b2c7c1ebf5ded777122d8f03f914287b822081170d1
font_02_sfnt_off000085af.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x85AF 16120 bytes
SHA-256: 15a68420f1c377824b8c1fd571ac7c30556db1b4bc05006bf44ec3f6c6c83208

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