Malicious PDF — malware analysis report

Static analysis result for SHA-256 17b46099b738c7c1…

MALICIOUS

PDF

46.8 KB Created: 2020-09-01 14:28:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9d2a3ad565e0886f655f1779cb1b1318 SHA-1: d22303b95e7fd97ddafd00211a3356720596c139 SHA-256: 17b46099b738c7c129b4d35f572c34117ea9c22e69aada851d5acdbccad47c88
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file contains a large number of embedded links, many of which point to external PDF files, suggesting a link farm or SEO poisoning tactic. One prominent URL, 'https://ttraff.cc/wix?keyword=canva+premium+apk+mod+2019', is flagged as a malicious redirector, indicating an attempt to lead the user to malicious content. The ML classifier also strongly flagged this PDF as malicious.

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.cc/wix?keyword=canva+premium+apk+mod+2019
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/8de238_13da1e50d4f84521a107892d14af2785.pdf
    • https://static.usrfiles.com/ugd/b8c837_db5ce2301eab471998b6d72e6d83ad04.pdf
    • https://static.usrfiles.com/ugd/b7ed05_a950cbb486664209aaa9a280b98acab7.pdf
    • https://cdn.shopify.com/s/files/1/0434/0157/6615/files/48315858107.pdf
    • https://cdn.shopify.com/s/files/1/0430/9244/3303/files/73153812881.pdf
    • https://cdn.shopify.com/s/files/1/0431/9730/0885/files/centrales_termicas.pdf
    • https://cdn.shopify.com/s/files/1/0432/3049/4878/files/nobobidamadakulil.pdf
    • https://cdn.shopify.com/s/files/1/0438/3889/8333/files/tall_building_foundation_design.pdf
    • https://cdn.shopify.com/s/files/1/0428/9904/6553/files/georgian_cherubic_hymn_sheet_music.pdf
    • https://cdn.shopify.com/s/files/1/0434/8523/3318/files/wafibu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000686a.bin
779526acf3a8faa930e3f8582af55634f2c6234808f6f4df869af7699508f89b
pdf-font-stream PDF embedded font (sfnt) at offset 0x686A 5408 bytes
font_01_sfnt_off00007abd.bin
76a885de2ba76af8822d62a6bdf8bdf2afc1897147b4e7934c3164b29ea47ecc
pdf-font-stream PDF embedded font (sfnt) at offset 0x7ABD 2736 bytes
font_02_sfnt_off00008679.bin
bd0e7c7f95d64c9ba4a4d97913c5d39517cb777dce81f6c77769ee661a332840
pdf-font-stream PDF embedded font (sfnt) at offset 0x8679 12304 bytes