Malicious PDF — malware analysis report

Static analysis result for SHA-256 9078716823881c54…

MALICIOUS

PDF

45.1 KB Created: 2020-08-06 19:58:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 346656a487b12ab2378a3f97cfc5b07e SHA-1: c1203108b79ce1442e0b64238e5fbe4070b6dee4 SHA-256: 9078716823881c5421ce74215b60e34d0a016f43c5c99502a4804f1da1fcfecb
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'ttraff.ru'. Additionally, it exhibits characteristics of a PDF link farm, embedding numerous external links, many hosted on Shopify. The ML classifier strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the same malicious URL, reinforcing the intent to redirect users to potentially harmful content.

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.ru/pify?keyword=ahmet+hamdi+tanp%25C4%25B1nar+kitaplar%25C4%25B1+pdf
    • http://files.fabledcollective.com/uploads/1/3/0/7/130740022/paladudiguzu_fojafesanekin_guxusewaxexize_wazari.pdf
    • http://files.ridgemonthomeowners.com/uploads/1/3/0/9/130969211/7e72e.pdf
    • http://files.cli.solutions/uploads/1/3/1/4/131406435/dubasodewibif.pdf
    • http://files.p5pythons.com/uploads/1/3/1/6/131606668/1a16b3773b34.pdf
    • http://files.adripp.com/uploads/1/3/0/9/130969755/8902922.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/gokefowasunolanadupafaxo.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8665/files/tmux_list_sessions.pdf
    • https://cdn.shopify.com/s/files/1/0438/9981/4040/files/anabolics_2020_william_llewellyn.pdf
    • https://cdn.shopify.com/s/files/1/0439/5089/9368/files/jewukaratavukoteb.pdf
    • https://cdn.shopify.com/s/files/1/0431/3897/3857/files/zubijumulesatagok.pdf
    • https://cdn.shopify.com/s/files/1/0430/4217/7181/files/xiwedazod.pdf
    • https://cdn.shopify.com/s/files/1/0433/9027/1651/files/37994892659.pdf
    • https://cdn.shopify.com/s/files/1/0431/9952/9120/files/7354215223.pdf
    • https://cdn.shopify.com/s/files/1/0432/3134/6856/files/bcs_question_bank_solution.pdf
    • https://cdn.shopify.com/s/files/1/0429/0750/0711/files/ruwed.pdf
    • https://cdn.shopify.com/s/files/1/0435/0689/2960/files/arabisches_alphabet.pdf
    • https://cdn.shopify.com/s/files/1/0435/4179/0871/files/12254362272.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_off00006f99.bin
727e5acd192b60397c3c8561f12b5cbc1a4ce45235cbe32195ffa31ab16d737c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6F99 5188 bytes
font_01_sfnt_off0000811b.bin
b57eccd7da1b36bea47603648158171723ca9607a121c9b91f39e1be33266e47		 pdf-font-stream PDF embedded font (sfnt) at offset 0x811B 11820 bytes

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