Malicious PDF — malware analysis report

Static analysis result for SHA-256 78fd2c2bc536a02e…

MALICIOUS

PDF

52.7 KB Created: 2020-08-31 02:55:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c6ac7a1fbfb37be730c777c73c9adf26 SHA-1: 88ea3314dc22cfd2097bdc0e45925e122479327c SHA-256: 78fd2c2bc536a02eabfafdbbcd66f1632f9b475364b94cae7ee9cc898611fe80
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is likely used to obscure the final destination of the malicious payload. The document also contains a large number of embedded links to Shopify-hosted PDFs, suggesting a link farm or SEO poisoning tactic. No scripts were extracted, and the document body is heavily obfuscated, limiting further analysis of the specific lure.

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/wix?keyword=10+kva+%25E0%25B8%25A3%25E0%25B8%25B0%25E0%25B8%259A%25E0%25B8%259A%25E0%25B8%25AA%25E0%25B8%25B8%25E0%25B8%25A3%25E0%25B8%25B4%25E0%25B8%25A2%25E0%25B8%25B0%25E0%25B8%2588%25E0%25B8%25B1%25E0%25B8%2581%25E0%25B8%25A3%25E0%25B8%25A7%25E0%25B8%25B2%25E0%25B8%25A5%25E0%25B8%2599%25E0%25B8%25B5%25E0%25B9%2589%25E0%25B8%25A3%25E0%25B8%25B2%25E0%25B8%2584%25E0%25B8%25B2
    • https://cdn.shopify.com/s/files/1/0435/5067/1007/files/zodobawikevufe.pdf
    • https://cdn.shopify.com/s/files/1/0431/7783/6702/files/lipelekujuwofiropomem.pdf
    • https://cdn.shopify.com/s/files/1/0429/6422/2101/files/sesotavo.pdf
    • https://cdn.shopify.com/s/files/1/0439/3864/4123/files/counterparty_credit_risk_models.pdf
    • https://cdn.shopify.com/s/files/1/0431/9461/3924/files/zolewibawixod.pdf
    • https://cdn.shopify.com/s/files/1/0433/0982/6213/files/7600077746.pdf
    • https://cdn.shopify.com/s/files/1/0432/4350/3783/files/free_download_spoken_english_book.pdf
    • https://cdn.shopify.com/s/files/1/0433/7077/4693/files/luvebesikonamovedukagofug.pdf
    • https://cdn.shopify.com/s/files/1/0435/3009/2696/files/specified_platform_toolset_v140_is_not_installed.pdf
    • https://cdn.shopify.com/s/files/1/0434/5656/1318/files/bepatujuzojaku.pdf
    • https://cdn.shopify.com/s/files/1/0448/9651/8299/files/wordly_wise_3000_book_8_lesson_8.pdf
    • https://cdn.shopify.com/s/files/1/0434/2926/5574/files/lazawuzesixovej.pdf
    • https://cdn.shopify.com/s/files/1/0439/7016/6942/files/casino_full_movie_in_dual_audio.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
stream_005_off00007961.bin
aa2180b15041228cd343b1eb4d02cf1a15612ed73c722580e33dda2eafa7de60		 decompressed-pdf-stream PDF FlateDecoded stream at offset 0x7961 15744 bytes
font_00_sfnt_off0000526f.bin
f9eff501fced0fd9151e6e46433c17e46ae6a3178a57b5e68ef0e537b84aa500		 pdf-font-stream PDF embedded font (sfnt) at offset 0x526F 4596 bytes
font_01_sfnt_off00006228.bin
aefcf6bb9c6141d73dddac51c632fffb9be43c1a2499370c7f70b6e3c02a5238		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6228 8772 bytes
font_03_sfnt_off0000a358.bin
693e677d52ebf02f15c5f48ffa4d17c03bf1211a577a4a93173dfc41e0ec7116		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA358 8872 bytes

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