Malicious PDF — malware analysis report

Static analysis result for SHA-256 4fa9051e4db0e91d…

MALICIOUS

PDF

41.4 KB Created: 2020-08-31 15:42:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 633af957057c04e8702afa0e978f055e SHA-1: dd3f3715b1c63b09caa3a272c25f4c1310126727 SHA-256: 4fa9051e4db0e91d5a9e92e8377e99c56d0c572159d679bb896353588704833c
128 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded links, many of which are benign but serve to obscure the malicious intent. The document body, though heavily obfuscated, also contains the malicious URL. The primary attack pattern involves redirecting the user to a potentially harmful site.

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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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=bestwap+my+name+ringtone
    • https://cdn.shopify.com/s/files/1/0431/4116/9303/files/twitter_app_icon_android.pdf
    • https://cdn.shopify.com/s/files/1/0435/4444/5092/files/30999015177.pdf
    • https://cdn.shopify.com/s/files/1/0432/0077/4307/files/apa_writing_style_manual.pdf
    • https://cdn.shopify.com/s/files/1/0431/6869/4421/files/bongo_music_2018.pdf
    • https://cdn.shopify.com/s/files/1/0427/8353/9366/files/wowevurakunedumebidafax.pdf
    • https://static.usrfiles.com/ugd/1be480_66f430eb09ba41dca3440b0f74803bc7.pdf
    • https://static.usrfiles.com/ugd/bfbc46_5b2f27a45ce943cab0cc6641abb96e51.pdf
    • https://static.usrfiles.com/ugd/d4a9d6_98d69aae09ab45c6b07471d7c7e15ee0.pdf
    • https://static.usrfiles.com/ugd/b8c837_72f3e7aed4a646a0a6eb583b5daed43c.pdf
    • https://static.usrfiles.com/ugd/7c3584_28b5d56493714395901bda4fca70e4f4.pdf
    • https://static.usrfiles.com/ugd/d54300_41b2d949c56141c591ccb4dff7aea521.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a227b7e916a457b9ae8e2dbba4cf81c.pdf
    • https://static.usrfiles.com/ugd/02beb7_bafc092ac3eb498d8bd11e89d0bbc386.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_off0000643b.bin
892581647b07dc72b3b22a6ef1c0234ddb9311ffb4f991539bed1d04716a868e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x643B 5352 bytes
font_01_sfnt_off00007677.bin
934364efc8c21387ec47d56e2828959b8c4e895ea0ee0b11067fd8eb26aa374c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7677 10196 bytes

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