Malicious PDF — malware analysis report

Static analysis result for SHA-256 ee8a73eaefe086c2…

MALICIOUS

PDF

44.5 KB Created: 2020-08-11 00:12:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ce2c14bfef1ef953c8fa932fe06caf89 SHA-1: 16d55d2a6eab512c6f422a8cbba73e3ddd99202b SHA-256: ee8a73eaefe086c29fcdb35865a7a5921ee847cdb56ef4e0af51a287604ef39e
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains numerous embedded links, with a critical heuristic identifying a malicious redirector at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to translation and the redirector URL, suggesting a lure to a malicious site. The ML classifier also strongly indicated maliciousness.

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=traduction+anglais+fran%25C3%25A7ais+pdf+en+ligne
    • http://files.nlign.org/uploads/1/3/2/7/132712358/d4a8806be4c.pdf
    • http://wotini.nanaimoclippersmerch.com/uploads/1/3/1/6/131607062/4326887.pdf
    • http://vavevikix.barrongafford.org/uploads/1/3/1/3/131398097/gilodufa.pdf
    • https://cdn.shopify.com/s/files/1/0433/5380/0859/files/kijenefafo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8424/3351/files/pexosi.pdf
    • https://cdn.shopify.com/s/files/1/0441/4029/8392/files/ventral_hernia_patient_information.pdf
    • https://cdn.shopify.com/s/files/1/0435/8311/1323/files/85461727164.pdf
    • https://cdn.shopify.com/s/files/1/0431/6404/1373/files/90790721905.pdf
    • https://cdn.shopify.com/s/files/1/0430/8025/3593/files/54115341443.pdf
    • https://cdn.shopify.com/s/files/1/0431/6338/6017/files/30607230465.pdf
    • https://cdn.shopify.com/s/files/1/0430/4296/3613/files/66093592255.pdf
    • https://cdn.shopify.com/s/files/1/0427/8845/4559/files/girikirisavuzoni.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/sovaratumu.pdf
    • https://cdn.shopify.com/s/files/1/0431/9821/8400/files/ihk_berichtsheft_bayern.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c56.bin
289aa1cdb5a9a43554a4400cd762a3d1920e356d7a519ac9e2860ea0cc4c780d
pdf-font-stream PDF embedded font (sfnt) at offset 0x5C56 3896 bytes
font_01_sfnt_off00006a57.bin
38c935ea46aa4876e4dff4be89be1a5fbbf44cf37b4ab2049acf00274b26ff15
pdf-font-stream PDF embedded font (sfnt) at offset 0x6A57 5456 bytes
font_02_sfnt_off00007ca5.bin
87e4b93fa69363a52018086aa3507ea89a81d4964a5f5003836955091ed3665d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CA5 11676 bytes