Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c399cb688976613…

MALICIOUS

PDF

42.8 KB Created: 2020-08-06 10:46:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e53b22754270ad3d22460b63fa52dc79 SHA-1: 887ddc6eaea83abb534ec105f2e3313b74e63224 SHA-256: 2c399cb6889766139c9d6d57ea3e8f21c4fd1e743e8a5d70c8f55676ebac3397
154 Risk Score

Malware Insights

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

The PDF contains a critical redirector link to 'ttraff.com', indicating a phishing or malicious redirection attempt. The presence of a large number of external PDF links suggests a link farm or SEO poisoning tactic. The ML classifier strongly flagged this PDF as malicious. No scripts were extracted, but the primary attack vector appears to be the malicious URL embedded within the document.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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.
  • 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=the+alabaster+girl+pdf+file
    • http://files.artintr.com/uploads/1/3/1/4/131438161/8000679.pdf
    • http://gaxig.vaporhauschicago.com/uploads/1/3/2/7/132740405/6683773.pdf
    • http://files.glsgroupllc.com/uploads/1/3/0/7/130776327/xupixovosebetek-lowakax-kejuwexuzi-navetube.pdf
    • http://files.idoutpost.com/uploads/1/3/1/4/131437919/ziruxasiz-kalodox-sikalukore-tebisu.pdf
    • http://files.flamencoinsheffield.com/uploads/1/3/1/4/131438477/zazodufotugakojalilu.pdf
    • https://cdn.shopify.com/s/files/1/0439/8913/9614/files/25352127396.pdf
    • https://cdn.shopify.com/s/files/1/0431/0355/1645/files/4316327525.pdf
    • https://cdn.shopify.com/s/files/1/0440/1335/5166/files/91691637549.pdf
    • https://cdn.shopify.com/s/files/1/0431/5843/8039/files/mapa_metro_amsterdam_2020_pdf.pdf
    • https://cdn.shopify.com/s/files/1/0430/9454/0452/files/bloody_mary_songs.pdf
    • https://cdn.shopify.com/s/files/1/0429/8289/9871/files/65201204664.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rowogumidakedodovejizana.pdf
    • https://cdn.shopify.com/s/files/1/0429/9702/2879/files/league_of_legends_minecraft_skins.pdf
    • https://cdn.shopify.com/s/files/1/0434/2261/3669/files/kezapuvozigerowebuzeg.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/install_flask_mac.pdf
    • https://cdn.shopify.com/s/files/1/0432/9163/9974/files/caproni_tutte_le_poesie.pdf
    • https://cdn.shopify.com/s/files/1/0431/5080/3099/files/69320009981.pdf
    • http://www.w3.org/1999/02/22-rdf-syntax-ns#
    • http://purl.org/dc/elements/1.1/
    • http://ns.adobe.com/pdf/1.3/
    • http://ns.adobe.com/xap/1.0/
    • http://ns.adobe.com/xap/1.0/mm/
    • http://ns.adobe.com/xap/1.0/rights/

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000068ab.bin
04f8350afc55b6b9905fc94ff49ea965fa01cdfe773684a16f8afc76f9088436		 pdf-font-stream PDF embedded font (sfnt) at offset 0x68AB 5392 bytes
font_01_sfnt_off00007aee.bin
3e1bf4c0f8e803237657c25b28cfd4a2ddec68d4d424577953cc5a1932c35ac2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AEE 10332 bytes

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