Malicious PDF — malware analysis report

Static analysis result for SHA-256 4166d371938559c5…

MALICIOUS

PDF

50.8 KB Created: 2020-08-15 04:14:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c15ede0f7fc8f35690eaa65d5d14f992 SHA-1: fe2cbe31cce31c22b50bfc41a85a1ca036a44a96 SHA-256: 4166d371938559c5b9116ca2ae97ea30f0257cd084ac9b8f51d23ec6949e0995
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to Shopify domains hosting other PDFs, which is characteristic of a link farm designed for SEO manipulation. One prominent link, 'https://ttraff.cc/pify?keyword=chalbaaz+bangla+movie+hd+video+song', is identified as a malicious redirector. The document body, though heavily obfuscated, contains text related to a movie title and the authoring application, suggesting a lure to disguise the malicious intent of the embedded links. The primary goal appears to be redirecting users to malicious infrastructure.

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.cc/pify?keyword=chalbaaz+bangla+movie+hd+video+song
    • http://files.seiburyusanjose.com/uploads/1/3/1/4/131454190/1f3923.pdf
    • http://files.livetinyandtravel.com/uploads/1/3/1/4/131453588/7b6a997ba.pdf
    • http://wolur.intimatelyyoursweddings.com/uploads/1/3/0/7/130774982/wuvazukal.pdf
    • http://files.sapientboutique.com/uploads/1/3/1/8/131871745/pidera.pdf
    • http://poxumuge.slyxiong.com/uploads/1/3/2/6/132681361/xewubixabewir.pdf
    • https://cdn.shopify.com/s/files/1/0437/6562/9077/files/zegutexo.pdf
    • https://cdn.shopify.com/s/files/1/0436/9940/4965/files/mudadezanapu.pdf
    • https://cdn.shopify.com/s/files/1/0432/4897/6027/files/11632020614.pdf
    • https://cdn.shopify.com/s/files/1/0431/1112/1063/files/cdma_workshop_free_download_full_version.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/dejotoxirebogoro.pdf
    • https://cdn.shopify.com/s/files/1/0435/7872/0414/files/67883169260.pdf
    • https://cdn.shopify.com/s/files/1/0430/8389/0850/files/82850064901.pdf
    • https://cdn.shopify.com/s/files/1/0433/4547/7783/files/935144993.pdf
    • https://cdn.shopify.com/s/files/1/0430/8212/1377/files/mizadedumidumupedezej.pdf
    • https://cdn.shopify.com/s/files/1/0430/4489/6925/files/ximatupegobevewinul.pdf
    • https://cdn.shopify.com/s/files/1/0436/3350/8512/files/ligukumegokalawu.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/1/0430/8212/1377/files/

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000683f.bin
940bf414c4414f321062b3b6cc0ec4020117b4a803e2dba049395cc95f4f6a32
pdf-font-stream PDF embedded font (sfnt) at offset 0x683F 5296 bytes
font_01_sfnt_off00007a20.bin
c5cc4c5f4291b4abcc16c8c5687a54341decec9700f1e6e5c065285c1e35cee5
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A20 6480 bytes
font_02_sfnt_off00008ead.bin
6b3d65f43e358748eddfa42302f5122b05de292d0b7fe786122624c2657cb4cc
pdf-font-stream PDF embedded font (sfnt) at offset 0x8EAD 15088 bytes