Malicious PDF — malware analysis report

Static analysis result for SHA-256 440667b06a2ea0e0…

MALICIOUS

PDF

97.8 KB Created: 2020-08-25 12:13:16 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bf94a4664143c6e2564eb77ff82584b7 SHA-1: 7d0e04ca1e8b5af63e933433459603daf88046b2 SHA-256: 440667b06a2ea0e0c4f38364f4627d0d4917f163f4195459d2aa67bfda12e9d1
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1204.002 Malicious Link

The PDF contains a malicious redirector link disguised as a document title. The link leads to `https://ttraff.ru/pify?keyword=neoliberalismo+en+america+latina+pdf`, which is flagged as malicious. The document body, though heavily obfuscated, also contains this URL, reinforcing the malicious intent. The ML classifier also strongly indicated maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 3

  • 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.
  • 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=neoliberalismo+en+america+latina+pdf
    • http://files.eseofmi.com/uploads/1/3/0/8/130813866/a53dc4e.pdf
    • https://cdn.shopify.com/s/files/1/0431/6656/4520/files/rowakujizigoforimuxabe.pdf
    • https://cdn.shopify.com/s/files/1/0428/5317/1356/files/defepoberotoluvonij.pdf
    • https://cdn.shopify.com/s/files/1/0435/9792/2461/files/nukiwivexifenun.pdf
    • https://cdn.shopify.com/s/files/1/0435/7750/7999/files/10962430631.pdf
    • https://cdn.shopify.com/s/files/1/0441/0372/9304/files/40123039234.pdf
    • https://cdn.shopify.com/s/files/1/0440/3236/0613/files/vegagaxabaf.pdf
    • https://cdn.shopify.com/s/files/1/0437/7418/1534/files/python_reverse_shell.pdf
    • https://cdn.shopify.com/s/files/1/0437/4121/6919/files/72447858433.pdf
    • https://cdn.shopify.com/s/files/1/0434/0904/7708/files/graves_preseason_6.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/72593533024.pdf
    • https://cdn.shopify.com/s/files/1/0432/4678/0579/files/spanish_words_with_english_translation.pdf
    • https://cdn.shopify.com/s/files/1/0437/1241/3851/files/utorrent_pro_apk_cracked_version.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_off000128f4.bin
6a025670df34f04cbab710e9192b1d24a23907fb8925d0f5aefb8642520d47d0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x128F4 5412 bytes
font_01_sfnt_off00013b3c.bin
48cbfeb98bc6241e53f7e6c22ca03f065daefcad557eaf001e0e554f1b006c36		 pdf-font-stream PDF embedded font (sfnt) at offset 0x13B3C 12332 bytes
font_02_sfnt_off00016330.bin
e1ecdaf5f931254822c08e14176e742ed940844fb6ecb9fcb1e73603f1784b15		 pdf-font-stream PDF embedded font (sfnt) at offset 0x16330 16076 bytes

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