Malicious PDF — malware analysis report

Static analysis result for SHA-256 b13c4f8916731250…

MALICIOUS

PDF

57.1 KB Created: 2020-09-01 03:40:07 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b6391cdadca89bed00c213758347e26c SHA-1: 1d85b0ce531c3d6c2428fb866d26f969bddcb1a8 SHA-256: b13c4f8916731250ef2c8ced2fbb01ae436071a6765ddff010c2ee9d1364ee14
128 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 specifically pointing to a known malicious redirector. The document body text and heuristics suggest a lure related to an 'iitm gate answer key', intended to trick the user into clicking the malicious link. The presence of a download button heuristic further supports the deceptive nature of the document.

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.
  • 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.com/wix?keyword=iitm+gate+answer+key
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/ropuxikasafomudixaxo.pdf
    • https://cdn.shopify.com/s/files/1/0439/5171/8558/files/23759824916.pdf
    • https://cdn.shopify.com/s/files/1/0431/2317/9677/files/zepokolulopigukuroli.pdf
    • https://static.usrfiles.com/ugd/b8c837_b4904fb0ba084e1d9d91f1739727aeed.pdf
    • https://static.usrfiles.com/ugd/b8c837_6c0238f118ca4d269845d0bdfe52e7ee.pdf
    • https://static.usrfiles.com/ugd/9b7d8a_f135d9d5c3104a9c9f968e37c90c1aaf.pdf
    • https://static.usrfiles.com/ugd/32acb1_13e48142419c48f894ddcc68c0c60970.pdf
    • https://static.usrfiles.com/ugd/7603ae_293422fb57c74e6fa7c06fcec7653862.pdf
    • https://cdn.shopify.com/s/files/1/0428/5048/4390/files/vunelebomeb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9807/1450/files/30032073778.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/melogimifamasukegog.pdf
    • https://cdn.shopify.com/s/files/1/0433/5766/7487/files/ecological_tinkers_construct.pdf
    • https://cdn.shopify.com/s/files/1/0432/7840/1700/files/fbi_uniform_crime_reporting_ucr_program.pdf
    • https://static.usrfiles.com/ugd/576447_16055dd6b30a40e796cf791858db5a99.pdf
    • https://static.usrfiles.com/ugd/c33cdb_5af78d7d33fe4442810600a1f23d5ddd.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000743c.bin
5938d1f4dec25b226332f1e4622878df34d01fbc9df504c94312536b09f101ab		 pdf-font-stream PDF embedded font (sfnt) at offset 0x743C 4844 bytes
font_01_sfnt_off000084a2.bin
b15d76c4e56a39671f87dfc285c015e4357183503f6fd96dc65c72dc3e5d0339		 pdf-font-stream PDF embedded font (sfnt) at offset 0x84A2 15172 bytes
font_02_sfnt_off0000b3e2.bin
4bd16c8abd39118228c1571b0005d4eb3b3e943e572fd92a2a80cfcb7b749349		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB3E2 16164 bytes
font_03_sfnt_off0000c8f7.bin
ce7e2e230a41ba6fc2d7d2240890c8289d67876d84a3d076d67c0b48111c8230		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC8F7 4324 bytes

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