Malicious PDF — malware analysis report

Static analysis result for SHA-256 dd2435df31854492…

MALICIOUS

PDF

79.9 KB Created: 2020-09-10 04:30:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e997ac1a82352ad0c78d8a7921353870 SHA-1: 193d3ff378432d034b64c83d7d1aa3fdcc99faa3 SHA-256: dd2435df3185449216d135d30bc7b0e62dbab7a10be4a4f2d0da1444bf470dfd
154 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.com'. Additionally, it exhibits a PDF link farm heuristic, indicating a large number of external links, many hosted on Shopify. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to this malicious site.

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=anil+kapoor+song
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/magizokoluredofet.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/98908457197.pdf
    • https://cdn.shopify.com/s/files/1/0458/2447/5299/files/resignation_letter_uk_template_1_week_notice.pdf
    • https://cdn.shopify.com/s/files/1/0433/9482/6396/files/emitra_new_rate_list_2020.pdf
    • https://static.usrfiles.com/ugd/79cb75_cd84076a59094b76bc2d56a20719e66d.pdf
    • https://static.usrfiles.com/ugd/b8c837_8bda8bdaa3984470a4fde9f2de22f781.pdf
    • https://static.usrfiles.com/ugd/405339_790c8bd0707048be884c9b06201eaa04.pdf
    • https://static.usrfiles.com/ugd/0b1cf2_e893b7469ba640a89619339c7cc9542a.pdf
    • https://static.usrfiles.com/ugd/808cd0_3732b4f926784ff2a9808b78d968b1f8.pdf
    • https://cdn.shopify.com/s/files/1/0429/1713/4502/files/71470906262.pdf
    • https://cdn.shopify.com/s/files/1/0434/2041/8198/files/jetezo.pdf
    • https://cdn.shopify.com/s/files/1/0433/6818/6024/files/kjv_telugu_bible_download_free.pdf
    • https://cdn.shopify.com/s/files/1/0435/0751/5558/files/7413890987.pdf
    • https://cdn.shopify.com/s/files/1/0433/4531/3941/files/fuviwejizokal.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/40133843423.pdf
    • https://cdn.shopify.com/s/files/1/0439/8995/8814/files/saguvurunitafosiv.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000e7b5.bin
0560989a1662c3dbdcb3e0ee73734894997573ef87e339f1f58fe54ae4089371		 pdf-font-stream PDF embedded font (sfnt) at offset 0xE7B5 4628 bytes
font_01_sfnt_off0000f75a.bin
e59e7fc99b392920a10a3273156146c069d4127f01a22375d969265ad07066ac		 pdf-font-stream PDF embedded font (sfnt) at offset 0xF75A 14456 bytes
font_02_sfnt_off000124b7.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2		 pdf-font-stream PDF embedded font (sfnt) at offset 0x124B7 4324 bytes

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