Malicious PDF — malware analysis report

Static analysis result for SHA-256 6434d2e54a188274…

MALICIOUS

PDF

56.1 KB Created: 2020-08-31 15:49:23 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8779c48281eb44473e5b1216d26cec3d SHA-1: 8f5c2199696f92f4b95e0868585ce80984d3badd SHA-256: 6434d2e54a188274f11d5fc6012854cc531939427ebeb921f5ba06470067d3d1
162 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains a mass of external links, with one specifically identified as a malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=upsc+botany+question+paper+pdf', which is flagged as a malicious redirector. This suggests the document is designed to lead users to malicious infrastructure, likely for further exploitation or phishing.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9999

Heuristics 5

  • 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.
  • Visual download / call-to-action button lure low SE_DOWNLOAD_BUTTON
    Document contains a call-to-action phrase ('Click here to download', 'Download Now', etc.) — low-signal unless other findings point to a malicious workflow
  • 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.me/wix?keyword=upsc+botany+question+paper+pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • http://www.daltonmaag.com/
    • http://fedorahosted.org/lohit
    • https://static.usrfiles.com/ugd/b8c837_0e89944775ce4cac9cbbc9645d74763d.pdf
    • https://static.usrfiles.com/ugd/b914b5_6cfb0569b5754d9bb1350ff3e764ec05.pdf
    • https://static.usrfiles.com/ugd/b8c837_5a163b0170c94cfbb48ce232486b0802.pdf
    • https://static.usrfiles.com/ugd/9ea91e_e8602217de4d4e4ea4169278b33c139e.pdf
    • https://static.usrfiles.com/ugd/6cf392_b098d832a3c64b39a6b0a8e88160e41b.pdf
    • https://static.usrfiles.com/ugd/455f95_7ab2ee5be3f34fc3836f35c287328181.pdf
    • https://static.usrfiles.com/ugd/4ae4db_de8c142f154c428eb612b6c5ec958d9c.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/advanced_systemcare_pro_12_key.pdf
    • https://cdn.shopify.com/s/files/1/0430/1075/2663/files/51462957987.pdf
    • https://cdn.shopify.com/s/files/1/0430/6986/6138/files/xezomeziwivupar.pdf
    • https://cdn.shopify.com/s/files/1/0433/8568/4124/files/enlace_peptidico.pdf
    • https://cdn.shopify.com/s/files/1/0429/3391/1705/files/26048070933.pdf
    • https://cdn.shopify.com/s/files/1/0429/3420/6631/files/high_fliers_report_2019.pdf
    • https://cdn.shopify.com/s/files/1/0434/6124/7138/files/wadepa.pdf
    • https://cdn.shopify.com/s/files/1/0434/3123/1655/files/yamaha_htr_7065_manual.pdf
    • https://cdn.shopify.com/s/files/1/0430/0704/9877/files/newizuvirosonimile.pdf
    • https://cdn.shopify.com/s/files/1/0434/0937/5383/files/gederokexuxajivagexup.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://dejavu.sourceforge.net
    • http://dejavu.sourceforge.net/wiki/index.php/License

Extracted artifacts 6

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000060e1.bin
a8d28fc30ca7d3f0ec76bd7720fde67107b66aa4dce53aac087c4a5c4cc195e6		 pdf-font-stream PDF embedded font (sfnt) at offset 0x60E1 5356 bytes
font_01_sfnt_off0000730a.bin
5e067315a2bd9524b6254977960f062bb129990ed69868068e29b4596197f3c8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x730A 2320 bytes
font_02_sfnt_off00007d5c.bin
2843d7094e112e94bfa950e5444ef232c3f01147cadeac65b68e45704c33550c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D5C 9780 bytes
font_03_sfnt_off00009f0f.bin
a349519ccbdbca3d75704c2becf615ab37801eb1543272228454131dceb83acc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F0F 16224 bytes
font_04_sfnt_off0000b45c.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB45C 4324 bytes
font_05_sfnt_off0000c25d.bin
78cbc9dcf7affb080887b0ff6311186ed0fa9d0d665ea996853720d56d4ba84c		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC25D 4088 bytes

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