Malicious PDF — malware analysis report

Static analysis result for SHA-256 133855ef58998fdd…

MALICIOUS

PDF

57.9 KB Created: 2020-09-01 17:26:29 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 90afe07754bcbe2e8cd9a2517d0701c8 SHA-1: fef0d79bd33327aec7fd6d9960b6ed3204828196 SHA-256: 133855ef58998fdde5d8fba4518e1a8269e4568bb8b7fb724369b709bef29863
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF contains a link farm designed to redirect users to potentially malicious content. The primary malicious link, 'https://ttraff.cc/wix?keyword=bagamathi+tamil+movie++hd', is identified as a redirector. The document's structure suggests it's part of a larger SEO poisoning or link farm campaign, aiming to drive traffic to other PDF documents.

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.cc/wix?keyword=bagamathi+tamil+movie++hd
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/77eba6_e0ca03057c43448ea8d3f7b3cc128110.pdf
    • https://static.usrfiles.com/ugd/aec2ea_f91b8508141947ca99928a38cc299b33.pdf
    • https://static.usrfiles.com/ugd/b7306e_44168fdd8df645559fc88a146b788b2c.pdf
    • https://static.usrfiles.com/ugd/16a96a_fbb8eea933ff41dc8540a97cfed4ccaa.pdf
    • https://static.usrfiles.com/ugd/69695d_f93c3217924b48ea832091f8378334e2.pdf
    • https://static.usrfiles.com/ugd/b8c837_175f96dd976f40d58580415c47c74b16.pdf
    • https://cdn.shopify.com/s/files/1/0432/9422/8630/files/laketarigos.pdf
    • https://cdn.shopify.com/s/files/1/0437/7667/1895/files/.pdf
    • https://cdn.shopify.com/s/files/1/0433/0120/8232/files/64220682300.pdf
    • https://cdn.shopify.com/s/files/1/0432/9039/4788/files/sogejikobofirovepo.pdf
    • https://cdn.shopify.com/s/files/1/0437/5874/7800/files/the_cost_of_discipleship_bonhoeffer.pdf
    • https://cdn.shopify.com/s/files/1/0433/4921/3349/files/winibixikufedakepeti.pdf
    • https://cdn.shopify.com/s/files/1/0435/3975/9255/files/bhagavad_gita_full_text_english.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/
    • http://scripts.sil.org/OFL
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000800d.bin
e88a2376c33628fec128d02d7d9e5ffa47fa1704e03d4439d548bf2a39802bbc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x800D 4700 bytes
font_01_sfnt_off0000906d.bin
8700242a051511ba771e758c5a41261010b8b32f1ec9df4074fa04a775ea33d5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x906D 5072 bytes
font_02_sfnt_off0000a194.bin
1f26b1094dfd844b9f340d76bb2e65ef8e0dd9dde3c27f782c898fede507a55a		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA194 10220 bytes
font_03_sfnt_off0000c4e5.bin
ead7fd593d7f5feef6f283420e9b55f8fa4552f107c64b0063d474dd3355abd8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC4E5 16164 bytes

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