Malicious PDF — malware analysis report

Static analysis result for SHA-256 aa26b923f7443647…

MALICIOUS

PDF

49.5 KB Created: 2020-08-22 08:01:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2026-05-08
MD5: 3e899eb75fb07b5526345f8096a6a2da SHA-1: 94b3d7a45c886e0fcb5b3baebe7ed001860f8520 SHA-256: aa26b923f74436472a08ec2b17c855b3242eb44ac8b99303755d33afc094260b
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains embedded links that point to a redirector service, which in turn leads to a malicious URL. The document body, though heavily obfuscated, contains text related to sheet music and the malicious URL itself. This suggests a phishing or scam attempt where the user is tricked into visiting a compromised site by clicking on what appears to be a legitimate 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=erik+satie+gymnopedie+1+sheet+music+free In PDF document text
    • http://files.111sage.com/uploads/1/3/1/4/131438058/zofinefadurimux.pdfIn PDF document text
    • http://files.drobscience.com/uploads/1/3/1/6/131636941/velewiwaxanovez_mulodivemi_vajadorulusu.pdfIn PDF document text
    • http://figat.amishfictionbooks.com/uploads/1/3/0/7/130776031/9621684.pdfIn PDF document text
    • http://files.pascalletourneau.com/uploads/1/3/1/4/131406036/dc2cffa7.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/1/0432/1463/5165/files/19547829850.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5144/1560/files/zarutalujilowu.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0430/1750/2869/files/encyclopedic_dictionary_of_applied_geophysics_free.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/7473/8586/files/polycab_lt_cable_catalogue.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/2801/2456/files/epidemiologia_definicion.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/5442/3464/files/invalid_request_authentication_expired.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0431/3566/4284/files/irrigation_engineering_books.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0453/5540/1371/files/faringitis_herpetica.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/lujepiguruvalojedunoketaz.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000071f8.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x71F8 5712 bytes
SHA-256: 236f6d880b77180d11ff2e1e6976a1b9b5afbbac5868760314e9a278958d3146
font_01_sfnt_off0000854e.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x854E 15572 bytes
SHA-256: 955537d042a0eb8a2d24ca0d5974dd0fe6fc5e21df163c153f9ecbcb4d89afa0

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