Malicious PDF — malware analysis report

Static analysis result for SHA-256 52bd36303e4975ca…

MALICIOUS

PDF

60.7 KB Created: 2020-07-29 02:27:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 0386b5d4342356fa4ae2c319fe36e83d SHA-1: 28d0a522226f41df57b101a1fb40f285278fc23a SHA-256: 52bd36303e4975cab86fd235a4ef1aad19589cde995cfe423477bf1563362452
136 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains multiple embedded links, with one identified as a malicious redirector. The document body, though heavily obfuscated, suggests a lure related to a 'Bundelkhand university phd form' and includes phrases indicative of a fake invoice or download lure. The presence of a malicious redirector link strongly suggests an attempt to lead the user to a malicious site for further exploitation.

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.
  • Fake invoice / payment lure low SE_INVOICE_LURE
    Document contains invoice or payment language paired with an action verb — useful context when combined with link, macro, or attachment indicators
  • 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
  • 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.ru/pify?keyword=bundelkhand+university+phd+form
    • http://files.nuskin-success.com/uploads/1/3/1/0/131070611/zezopufabonoriw_lixesonibidig_kagirasenufak_verifavinuju.pdf
    • http://files.mrbaugher.com/uploads/1/3/1/4/131482887/fd36fcb1c7.pdf
    • http://files.morrowworldpost.com/uploads/1/3/0/7/130775537/4fa63224d5.pdf
    • http://files.nkshoporlando.com/uploads/1/3/1/8/131856257/2552171.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/muxajuvorupi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4251/2802/files/nogilaj.pdf
    • https://cdn.shopify.com/s/files/1/0430/7196/3296/files/wuxegimirovexaroxoxep.pdf
    • https://cdn.shopify.com/s/files/1/0437/9423/5553/files/wemetisen.pdf
    • https://cdn.shopify.com/s/files/1/0439/1839/3499/files/87279983617.pdf
    • https://cdn.shopify.com/s/files/1/0431/4837/8280/files/funudesudukiduro.pdf
    • https://cdn.shopify.com/s/files/1/0431/5830/6965/files/zojatimalemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/6705/6028/files/bifodetexusobega.pdf
    • https://cdn.shopify.com/s/files/1/0430/0223/2983/files/fetima.pdf
    • https://cdn.shopify.com/s/files/1/0436/5352/9753/files/86079964562.pdf
    • https://cdn.shopify.com/s/files/1/0432/0736/0667/files/74481234038.pdf
    • https://cdn.shopify.com/s/files/1/0429/6520/5141/files/zefamokepetov.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/
    • https://cdn.shopify.com/s/files/1/0437/9423

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00009100.bin
5f8fddd33f914c75a1e3eea0cadc0bf13595ed833e274c8be5d31c2c4eb3e67c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9100 5436 bytes
font_01_sfnt_off0000a35f.bin
127ccfdfbff519aeefccef3ed0512a02b8334267e63941bc396e598efc01d386		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA35F 14172 bytes
font_02_sfnt_off0000cfd9.bin
c41fc46809d2260d2d1a821cef6bb00dae560fdbad380da94a93f29d012df54e		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCFD9 16164 bytes

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