Malicious PDF — malware analysis report

Static analysis result for SHA-256 79f2d6cfc6284f91…

MALICIOUS

PDF

49.6 KB Created: 2020-08-21 16:44:54 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ad670b6a647848e1cb989cbc84df76f1 SHA-1: 93fa9ffc9bacc3105fe7bbe35ecc7c071f50cf69 SHA-256: 79f2d6cfc6284f91daacc4cbd68935efb7e95285055105c220258186e9db0564
150 Risk Score

Malware Insights

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

The PDF file was flagged by multiple critical heuristics for containing malicious redirector links and a link farm. The embedded content, though largely garbled, includes the URL 'https://ttraff.cc/pify?keyword=desi+bagdi+song', which is identified as a malicious redirector. The file's purpose appears to be to lure users to malicious sites through a network of links.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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.cc/pify?keyword=desi+bagdi+song
    • http://zemavowa.oaklandmillsonline.com/uploads/1/3/0/7/130776436/4f002fed58.pdf
    • http://wefum.vanforum.org/uploads/1/3/0/7/130740164/5842824.pdf
    • http://files.accentphotographybykim.com/uploads/1/3/1/4/131438069/2647909.pdf
    • http://boviba.jesszhouzexi.com/uploads/1/3/0/8/130874474/1341640.pdf
    • https://cdn.shopify.com/s/files/1/0431/5014/7733/files/90798708536.pdf
    • https://cdn.shopify.com/s/files/1/0430/9549/0721/files/kasenonidefuvunizoloxuruf.pdf
    • https://cdn.shopify.com/s/files/1/0435/5837/1496/files/90741991647.pdf
    • https://cdn.shopify.com/s/files/1/0427/8163/8812/files/42649283667.pdf
    • https://cdn.shopify.com/s/files/1/0428/3862/2375/files/salvatore_ferragamo_belt_guide_fake_vs_real.pdf
    • https://cdn.shopify.com/s/files/1/0431/6079/7333/files/indent_in_google_sheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/4609/2445/files/feduf.pdf
    • https://cdn.shopify.com/s/files/1/0429/6808/8742/files/crits_apocryphes_chrtiens.pdf
    • https://cdn.shopify.com/s/files/1/0432/1378/3203/files/balifunul.pdf
    • https://cdn.shopify.com/s/files/1/0433/0212/5733/files/38706357578.pdf
    • https://cdn.shopify.com/s/files/1/0428/4248/8998/files/lozebufebewo.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004f13.bin
df86fcbdcf54b8a595402e250722dea2c48ea5eb26010bac1122956381e5ccf7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4F13 5004 bytes
font_01_sfnt_off00006019.bin
94f7f04c354b7c42189b541209bdac3d2056a6ae94e17fa8fbf2c94236be72ef		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6019 1872 bytes
font_02_sfnt_off00006908.bin
2de7700c1f796f1200e10b7a896e77761b7e7d8d0b0cc4fbe127698fcf05cdb1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6908 14816 bytes
font_03_sfnt_off00009683.bin
c47ae84a2ec41e7fa059731f921439adeb32cb05f1e60f575d9dfcc3f81c5bb8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9683 16088 bytes
font_04_sfnt_off0000ab89.bin
80a1056dce41a3761a77fc68cb9b2f8b7b012b3823259ada1cbae6ece9f9e9fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAB89 2804 bytes

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