Malicious PDF — malware analysis report

Static analysis result for SHA-256 dbae92f44451ed49…

MALICIOUS

PDF

49.6 KB Created: 2020-08-12 11:12:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e5ad336ed6668452eb09bdda642a3316 SHA-1: fd6074bd7d09ff8eba645be7573b8a8dd3d75bfb SHA-256: dbae92f44451ed490d677167d0434bcecc40055e76e0e076f9cae4683316a527
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one specifically pointing to a known malicious redirector at 'https://ttraff.com/pify?keyword=tangled+up+in+blue+chords+pdf'. The document body, though heavily obfuscated, also contains this URL, suggesting the primary intent is to redirect the user to malicious infrastructure. The presence of numerous other links hosted on cdn.shopify.com, while individually benign, contributes to a link farm pattern.

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=tangled+up+in+blue+chords+pdf
    • http://files.bibleverseshelp.com/uploads/1/3/1/1/131163867/6290ad9a3c5637.pdf
    • http://files.honeyhopfarm.com/uploads/1/3/1/6/131606876/pelozi_kusisugug_dilivame_nakawusam.pdf
    • http://files.kahntilesupply.com/uploads/1/3/2/3/132302907/kafisiru.pdf
    • http://files.kahntilesupp
    • https://cdn.shopify.com/s/files/1/0431/9998/7873/files/waviwuxekugigolotiwi.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/44994208471.pdf
    • https://cdn.shopify.com/s/files/1/0431/7754/1787/files/47375720291.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3783/files/agents_of_shield_season_1_torrent.pdf
    • https://cdn.shopify.com/s/files/1/0429/9040/3737/files/sejezemokikegikunebo.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/mubexuv.pdf
    • https://cdn.shopify.com/s/files/1/0439/6145/0654/files/12049137988.pdf
    • https://cdn.shopify.com/s/files/1/0439/3956/1630/files/werizugawave.pdf
    • https://cdn.shopify.com/s/files/1/0430/3618/0634/files/warurijij.pdf
    • https://cdn.shopify.com/s/files/1/0430/6649/1042/files/diabetes_mellitus_type_2_definition.pdf
    • https://cdn.shopify.com/s/files/1/0433/4557/6088/files/20062699921.pdf
    • https://cdn.shopify.com/s/files/1/0436/8406/9526/files/jpg_to_small_converter_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/17721531589.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_off00008413.bin
0d76b3d664d0cd2c1b82321e2d3db91e9e296b8891e72b678f564f4712ad8197
pdf-font-stream PDF embedded font (sfnt) at offset 0x8413 5504 bytes
font_01_sfnt_off000096b1.bin
e2334b9cbec0623b83eac0f2b2f95f2c2ab23ba18efcd3b548907ab768fe5922
pdf-font-stream PDF embedded font (sfnt) at offset 0x96B1 10048 bytes