Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9cb45dbc823e113…

MALICIOUS

PDF

48.1 KB Created: 2020-08-10 02:22:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a81dd8d0f7a652768dedece91014d03f SHA-1: e02194baaa5df7157314986cb64ad3b3aa146dff SHA-256: c9cb45dbc823e113613b5569a3928c4d7bb53b5bb68c8c3a08c7e86d7f15ab8b
150 Risk Score

Malware Insights

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

The PDF contains a high density of external links, many pointing to benign Shopify URLs, but one critical link to `ttraff.ru` is identified as a malicious redirector. The document body, though heavily obfuscated, contains the same malicious URL and a lure related to sheet music. This suggests the primary purpose is to redirect the user to malicious infrastructure, likely for further exploitation or malware delivery.

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.ru/pify?keyword=waltz+of+the+flowers+violin+sheet+music+pdf
    • http://files.marneltuckerpsyd.com/uploads/1/3/0/9/130968933/fuwezesitek_vodemipepirizi_rezab.pdf
    • http://files.vitoshapartners.com/uploads/1/3/0/7/130775009/4591719.pdf
    • http://files.bigblueword.org/uploads/1/3/0/7/130775366/32c9bf04eca1.pdf
    • http://files.wilcoxwellnessfitness.com/uploads/1/3/1/0/131070151/ac1ae596a1.pdf
    • http://files.ingecasteleyn.be/uploads/1/3/2/8/132816202/ddd7e07.pdf
    • https://cdn.shopify.com/s/files/1/0438/6321/2192/files/fazopeba.pdf
    • https://cdn.shopify.com/s/files/1/0433/3296/0409/files/introduction_to_containers_kubernetes_and_red_hat_openshift.pdf
    • https://cdn.shopify.com/s/files/1/0430/6249/3345/files/lemunalekifigiluwowikav.pdf
    • https://cdn.shopify.com/s/files/1/0436/2344/8736/files/87999680635.pdf
    • https://cdn.shopify.com/s/files/1/0431/8117/9048/files/ffxiv_plugin_act.pdf
    • https://cdn.shopify.com/s/files/1/0428/1293/2255/files/nogemupilibavabinevekegar.pdf
    • https://cdn.shopify.com/s/files/1/0454/7385/7686/files/12233076837.pdf
    • https://cdn.shopify.com/s/files/1/0429/7215/1959/files/attitude_motivation_test_battery.pdf
    • https://cdn.shopify.com/s/files/1/0431/1557/7504/files/79523208970.pdf
    • https://cdn.shopify.com/s/files/1/0431/7220/0608/files/61689697517.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/45476093935.pdf
    • https://cdn.shopify.com/s/files/1/0437/7971/9330/files/78819397238.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/georgia_driver_s_manual_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0452/3737/1037/files/linkedin_recruiter_training.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5461/files/didoletasekafakizetevena.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000065e9.bin
3c1e91c80719a6a76d14e5d31a8273cfa7904ef8b0af2b931339ee2b00703fb7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x65E9 5608 bytes
font_01_sfnt_off000078fb.bin
e05679d9524adb85c4caf33619e75fa453dd8553c390a9fdcfa4373c07ac9b42		 pdf-font-stream PDF embedded font (sfnt) at offset 0x78FB 10592 bytes
font_02_sfnt_off00009d72.bin
b330339415d7fa9c1b652c1fb2a052ec06569061b7b71506ab53161dc9b94742		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9D72 16100 bytes

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