Malicious PDF — malware analysis report

Static analysis result for SHA-256 fa67b6c9affb05ce…

MALICIOUS

PDF

44.6 KB Created: 2020-09-15 02:11:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 01c4dded5d2175119bdd7daaf81e8b93 SHA-1: d174a7a0bb3140523a2a40cfc5a4e548d39bc2bf SHA-256: fa67b6c9affb05ce09b6052759a0f77ac5f9e378756c79c08141eb27489925e6
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, many of which point to domains associated with link farms and redirectors. The primary malicious link, https://ttraff.club/pify?keyword=cell+organelles+worksheet+answers, is designed to redirect users to further malicious content. The document body, though heavily obfuscated, contains references to these URLs and appears to be a lure for educational content.

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.club/pify?keyword=cell+organelles+worksheet+answers
    • http://lawafavin.jillcranwellwarner.com/uploads/1/3/1/3/131379866/pobabuva.pdf
    • http://files.coolblue-bb.com/uploads/1/3/1/3/131382808/fugag_ruvejefisilan_pelepopemidev_mefikarajosun.pdf
    • http://files.deliveredvessels.org/uploads/1/3/1/0/131070420/wesuxunijawewaf.pdf
    • https://static.usrfiles.com/ugd/98e298_dd8748bf0ba9438baabf7d590835127b.pdf
    • https://static.usrfiles.com/ugd/2eedf1_65a31e59f89344448262e4a60952f27d.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_2f98504bec8d4a4381e69eb8829615a7.pdf
    • https://static.usrfiles.com/ugd/1decf9_c5beaceeb1ff4eacb615f80eb9328fea.pdf
    • https://static.usrfiles.com/ugd/8ade13_0c0573c11cff44aa8d7027fdb5474d2c.pdf
    • https://static.usrfiles.com/ugd/b1b3ad_ced1227b651941058ca157b3c9744177.pdf
    • https://static.usrfiles.com/ugd/8e9e2f_f6217ce011a04533a73fde00d76faf05.pdf
    • https://static.usrfiles.com/ugd/b0c8dc_31b8c8929a494655b621bdc3e76e6155.pdf
    • https://cdn.shopify.com/s/files/1/0459/7042/3968/files/pekisubuzitezigogime.pdf
    • https://cdn.shopify.com/s/files/1/0432/2502/2621/files/wajumuz.pdf
    • https://cdn.shopify.com/s/files/1/0434/1068/6113/files/december_1963_sheet_music.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000070a3.bin
6672ea7eb4e8896565aa01579614d9a9f23e1e9ba6979bd25989dfb5eac0003b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A3 5008 bytes
font_01_sfnt_off000081b5.bin
89962672c77ffcd877c380bbf014bcc26e30eb33fc2ca46b7a64082fa3663e0b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x81B5 10436 bytes

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