Malicious PDF — malware analysis report

Static analysis result for SHA-256 8a55b515fc252409…

MALICIOUS

PDF

57.2 KB Created: 2020-08-31 00:20:00 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ba70377e9b0066de35d5ff38bce57e93 SHA-1: adef7f538cd154578ef5f79e8379f7befe24f0f2 SHA-256: 8a55b515fc252409380938cf4662ead2d2272cfce4ea9a498ea6f7b0505c3a2a
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, a common tactic for SEO poisoning and redirecting users to malicious sites. One of the primary URLs, 'https://ttraff.com/wix?keyword=rocitizens+m%25C3%25BAsica+de+c%25C3%25B3digos+2018', is flagged as a malicious redirector. The document body, though heavily corrupted, appears to contain text related to music codes and the wkhtmltopdf application, suggesting a potential lure.

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.com/wix?keyword=rocitizens+m%25C3%25BAsica+de+c%25C3%25B3digos+2018
    • https://static.usrfiles.com/ugd/b8c837_5ee0e4978d2f4d1aa929704d3dc48fbb.pdf
    • https://static.usrfiles.com/ugd/99afdc_978f7d05617c409b951a2398dde4388f.pdf
    • https://static.usrfiles.com/ugd/b8c837_7b6c383620a24251be542cd703c03b6b.pdf
    • https://static.usrfiles.com/ugd/b8c837_1eb702da17994c0290abf58c1edf473f.pdf
    • https://static.usrfiles.com/ugd/67e251_da68e402549b42559a563c533e88d35f.pdf
    • https://static.usrfiles.com/ugd/b8c837_a7fdc11a3a664d91b2e4b417fcf2e36d.pdf
    • https://static.usrfiles.com/ugd/b8c837_03d499f51e7b4a1eb8ad2d3b9e66bfb0.pdf
    • https://static.usrfiles.com/ugd/6da380_ec3f99a427934d7c8854fbafb7c3fea4.pdf
    • https://static.usrfiles.com/ugd/b8c837_3ee1cf382a9e47acaf634a3dbb58835d.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2691/files/pigisidixeruloremeraf.pdf
    • https://cdn.shopify.com/s/files/1/0430/1098/2041/files/ejercicios_palabras_simples_compuestas_derivadas_y_parasintticas.pdf
    • https://cdn.shopify.com/s/files/1/0433/3037/1738/files/vibetofuzigowulo.pdf
    • https://cdn.shopify.com/s/files/1/0433/5491/4981/files/jinajofibebap.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 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005c2e.bin
629123bfde0685c5f69bbdd27ec008bde0224d5c30af1dabb990f6ee33ea778e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5C2E 6440 bytes
font_01_sfnt_off00006c22.bin
a59cc1c759a87588c24723643499bdf7a4f6a55c8cfda6e05b1dcec058f41145		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6C22 5748 bytes
font_02_sfnt_off00007f59.bin
8b97c1f8923aca8395c83c40d824c403a95f1c5313e985c3087d813186ef55f8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7F59 1680 bytes
font_03_sfnt_off000087c7.bin
217d16f8d4df2814b1d51795a2f3cacf88c66dfc80c820f733d3aad10a320303		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87C7 12104 bytes
font_04_sfnt_off0000af33.bin
1e2ea6692509c255bf65433eed5bfe5362b10632befb1c4f4a6255bed4ec03a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAF33 16752 bytes
font_05_sfnt_off0000c670.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC670 4324 bytes

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