Malicious PDF — malware analysis report

Static analysis result for SHA-256 dce1befc17bbfd56…

MALICIOUS

PDF

36.4 KB Created: 2020-10-07 03:18:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7) First seen: 2021-05-26
MD5: 5a6a478d44df3f7fefb1695c16514676 SHA-1: 1b6a846376b63fa58183a37092fb33aa51853cc4 SHA-256: dce1befc17bbfd568b305ddc502b17e7f1474350ac4489905d7118add6dae1ea
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains numerous embedded links, with one identified as a malicious redirector and others pointing to a link farm. The ML classifier also strongly indicated maliciousness. The document body, though heavily obfuscated, contains URLs that are likely part of a campaign to drive traffic to malicious sites, potentially for phishing or malware downloads.

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.link/pify?keyword=ukulele+lady+chords In PDF document text
    • https://site-1039378.mozfiles.com/files/1039378/juxoxasaratifopuguvo.pdfIn PDF document text
    • https://site-1036909.mozfiles.com/files/1036909/15801035741.pdfIn PDF document text
    • https://site-1038693.mozfiles.com/files/1038693/39201342444.pdfIn PDF document text
    • https://site-1042198.mozfiles.com/files/1042198/58530564611.pdfIn PDF document text
    • https://site-1039929.mozfiles.com/files/1039929/kabuxapij.pdfIn PDF document text
    • https://site-1038455.mozfiles.com/files/1038455/xisexegirolexogeli.pdfIn PDF document text
    • https://site-1037132.mozfiles.com/files/1037132/12399800774.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/1/0495/9204/1624/files/uco_candle_lantern_heater.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0486/1863/5422/files/game_hobo_5_hacked.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0480/8920/2851/files/asd_trade_show_vegas_2020.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0482/9406/8385/files/presidentes_de_colombia_asesinados.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0437/8637/1229/files/red_beans_vs_kidney_beans_chili.pdfIn PDF document text
    • https://cdn.shopify.com/s/files/1/0479/5190/4924/files/william_blake_marriage_of_heaven_and_hell.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_off0000502d.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x502D 5184 bytes
SHA-256: 90a52359a86acb504dd4293df66845abfa3d0581bda501039c589b0eb9045dcf
font_01_sfnt_off000061d6.bin pdf-font-stream PDF embedded font (sfnt) at offset 0x61D6 10372 bytes
SHA-256: 0d4d6089fa7a50d76ca170e00bbb97180d787abd805a27cee09328a0273697e7

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