Malicious PDF — malware analysis report

Static analysis result for SHA-256 1ea3fad829700417…

MALICIOUS

PDF

40.2 KB Created: 2020-08-31 15:14:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5246681a24c8e38decf7e98e1abbe11b SHA-1: 350ba6d7821be8f9d3ced79a3690a7c5ea7b3549 SHA-256: 1ea3fad829700417f80c7ff01bc54089112aaccdd94dc6cfc1537f25898fb412
120 Risk Score

Malware Insights

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

The PDF file contains a significant number of embedded links, with one identified as a known malicious redirector. The heuristic firings indicate a PDF link farm, suggesting the primary purpose is to distribute malicious links or manipulate search engine results for malicious gain. The document body contains garbled text and a suspicious URL, further supporting this assessment.

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/wix?keyword=kambi+kadha+audio+malayalam
    • https://static.usrfiles.com/ugd/15cd4d_587adadc132347d2b6b72a87b5482891.pdf
    • https://static.usrfiles.com/ugd/5de1df_3443be3c8c1a4dcc97aed5f36b46a10f.pdf
    • https://static.usrfiles.com/ugd/086daf_4509afb9f96d420e8a1334d9f80fe6b5.pdf
    • https://cdn.shopify.com/s/files/1/0433/3328/8088/files/kumubixugiwilidokuru.pdf
    • https://cdn.shopify.com/s/files/1/0436/6581/7753/files/bukawofepazule.pdf
    • https://cdn.shopify.com/s/files/1/0427/7082/5382/files/45683992235.pdf
    • https://cdn.shopify.com/s/files/1/0434/3191/9765/files/wunolemamijofi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8948/5221/files/csr_v4_0_bluetooth_driver_windows_10.pdf
    • https://cdn.shopify.com/s/files/1/0436/2544/7587/files/the_great_acting_teachers_and_their_methods.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/pidifibapopivenuwinuxab.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f85.bin
fc626fc1cf3c76327a51b1ac3ffc613c15c7703f01defefa8f5ee327cb3bc033		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F85 5068 bytes
font_01_sfnt_off000070a1.bin
1bbf6fcb18654704bb8753097e569193832fe7cac53a0327e7296b95b5311b9f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x70A1 10440 bytes

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