Malicious PDF — malware analysis report

Static analysis result for SHA-256 cbdeff894e1aa10d…

MALICIOUS

PDF

54.9 KB Created: 2020-08-12 01:01:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7fdb2dd2297c6c053b46da9d02f1cb15 SHA-1: 092bd503fe1458bfd70198bedcc70ac2d9a7f66a SHA-256: cbdeff894e1aa10d16a8bc9c562f2a7850b72bfbbece57574968b780d6e6243d
120 Risk Score

Malware Insights

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

The PDF contains numerous links, with one critical heuristic firing indicating a link to known malicious redirector infrastructure at 'ttraff.com'. The document body, though heavily obfuscated, contains text related to 'Java tutorial pdf' and the malicious URL, suggesting a lure. The presence of a link farm further supports the malicious intent of directing users to potentially harmful sites.

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.com/pify?keyword=java+tutorial+pdf+tutorialspoint+free
    • http://gewetivo.mistystevensbluegrass.net/uploads/1/3/1/3/131380600/xobakaboni.pdf
    • http://files.marknarins.com/uploads/1/3/2/6/132682848/zemesi_zelogozat_jofeluweviredeb.pdf
    • http://files.ememathshub.org/uploads/1/3/0/7/130775786/5799797.pdf
    • http://files.opadental.com/uploads/1/3/0/9/130969358/jawidunujoz.pdf
    • https://cdn.shopify.com/s/files/1/0429/6137/1290/files/mubivesamafejixanopida.pdf
    • https://cdn.shopify.com/s/files/1/0434/0196/9820/files/62519613481.pdf
    • https://cdn.shopify.com/s/files/1/0430/7927/0554/files/nakijumofug.pdf
    • https://cdn.shopify.com/s/files/1/0434/9041/0658/files/rezetek.pdf
    • https://cdn.shopify.com/s/files/1/0431/1921/4756/files/zenalusawojidozate.pdf
    • https://cdn.shopify.com/s/files/1/0437/4586/9985/files/kupenijenaxopu.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/vascular_anatomy_of_the_brain.pdf
    • https://cdn.shopify.com/s/files/1/0439/4090/5128/files/blackbird_beatles_guitar_tab.pdf
    • https://cdn.shopify.com/s/files/1/0428/9291/8937/files/222223695.pdf
    • https://cdn.shopify.com/s/files/1/0431/5034/4352/files/biceps_tendonitis_at_elbow_exercises.pdf
    • https://cdn.shopify.com/s/files/1/0430/7088/1946/files/19197041876.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00006a7a.bin
2ba6e0c4516ae528974428ab90d2fcb845e31fc6427c3681d976df34e50bf0fe		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A7A 6568 bytes
font_01_sfnt_off00007ac7.bin
f115f124009611ba0f017164eee8d42c6d79cb4f44dc4bcbd8a2e2f869f49a35		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7AC7 5084 bytes
font_02_sfnt_off00008c24.bin
f101fc3023143cbc24e87e2583c027b8b5ab7dfb9504abb66ff99af634bcdac9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C24 1804 bytes
font_03_sfnt_off000094ff.bin
4c5d887fa6ed90d65df2872cc17399efa1cb4e0d5766b09d9159663a0b752907		 pdf-font-stream PDF embedded font (sfnt) at offset 0x94FF 10296 bytes
font_04_sfnt_off0000b838.bin
64f21e55c2f29c6f605e8f9fd96e7f7b34f9b4a26fdc717ddead948457370e3b		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB838 16148 bytes

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