Malicious PDF — malware analysis report

Static analysis result for SHA-256 094f6a933c4a7bfc…

MALICIOUS

PDF

51.2 KB Created: 2020-08-31 07:11:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: dc83e769b1a5a0b751d0804dbadd1114 SHA-1: 5c42ec36f07f7bb118532c0c06b6cda31d0dabde SHA-256: 094f6a933c4a7bfcf3a01915ba1352c9bdf0c19ff3b34aebe13f54033b05cc9d
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

This PDF document contains embedded links that redirect to malicious infrastructure, specifically identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the primary malicious URL. The ML classifier also strongly indicated maliciousness. The presence of numerous links to external PDFs suggests a link farm or SEO poisoning attempt to distribute malicious content.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

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=sanyo+pro+xtrax+multiverse+projector
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.opentle.org
    • https://cdn.shopify.com/s/files/1/0428/9436/0743/files/putevedupenalasezusujuro.pdf
    • https://cdn.shopify.com/s/files/1/0433/6710/4668/files/extreme_copy_exe.pdf
    • https://cdn.shopify.com/s/files/1/0463/4853/3917/files/53237475217.pdf
    • https://cdn.shopify.com/s/files/1/0433/5036/0232/files/40852707165.pdf
    • https://cdn.shopify.com/s/files/1/0435/7482/1019/files/fuwekijubemerogika.pdf
    • https://cdn.shopify.com/s/files/1/0435/0954/7174/files/92882100618.pdf
    • https://cdn.shopify.com/s/files/1/0430/6783/4517/files/tudekodileteladodofidipoz.pdf
    • https://static.usrfiles.com/ugd/d54300_95e4e6b6647c494bbf8b89fc1d9c3fb4.pdf
    • https://static.usrfiles.com/ugd/b8c837_e0de796fada64556b4cb00baf59f5ec7.pdf
    • https://static.usrfiles.com/ugd/822ecd_680eaf3550404951ad62caa35038a637.pdf
    • https://cdn.shopify.com/s/files/1/0435/2652/0986/files/bukebafanofipi.pdf
    • https://cdn.shopify.com/s/files/1/0440/3537/5254/files/pengertian_arbitrase.pdf
    • https://cdn.shopify.com/s/files/1/0431/6571/2535/files/61107365008.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://www.gnu.org/licenses/gpl.html
    • http://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004b4f.bin
064eb02ccfa1272036ebae39d386b683d7d37825d60c2659f1a15849be79c61d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4B4F 5588 bytes
font_01_sfnt_off00005ed6.bin
e7dee97a2119b7bec8a0fb1828eccf5214d6726eeeeb284775d410968212e65c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5ED6 5488 bytes
font_02_sfnt_off0000716d.bin
be38186c9256ba0e64b07d34cca2e63b176d3ffd182ae4667a642b503e748fe0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x716D 6148 bytes
font_03_sfnt_off0000814d.bin
b4b43104c4408f941b77cc797ff5883176059b78966ba8f73a95b4c1e9959e59		 pdf-font-stream PDF embedded font (sfnt) at offset 0x814D 11408 bytes
font_04_sfnt_off0000a769.bin
a858ad06ee9285ef990c8ccf5509e6bce71cae8afc7f99ba8a1dcaf33198b628		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA769 16684 bytes

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