Malicious PDF — malware analysis report

Static analysis result for SHA-256 8f76e2882d308ea8…

MALICIOUS

PDF

46.4 KB Created: 2020-08-11 00:51:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d79cdd72f759b21e09ca2fb36d111dac SHA-1: a2600da454ea6baea0daec4f5c8ae8665d2830b6 SHA-256: 8f76e2882d308ea841c2f544d88777df157539961ca50a50f33dcad03f3bc7fe
160 Risk Score

Malware Insights

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

The PDF file contains a heuristic match for PDF_MALICIOUS_REDIRECTOR_LINK, indicating it directs users to a known malicious URL. Additionally, it exhibits characteristics of a PDF_SEO_LINK_FARM, suggesting it's part of a larger campaign to generate traffic. The presence of a SE_LOLBIN_RUN_COMMAND heuristic suggests the potential for executing arbitrary commands, likely facilitated by the embedded malicious link. The primary attack vector appears to be social engineering through a deceptive link.

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.
  • Visible LOLBin command execution instruction high SE_LOLBIN_RUN_COMMAND
    Document contains instructions or visible command text involving Windows script/execution tools such as PowerShell, mshta, cmd, rundll32, or regsvr32
  • 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=coordinate+system+in+autocad+pdf
    • http://files.braverthanthewaves.com/uploads/1/3/1/4/131453807/5359755.pdf
    • http://files.cooriecurls.com/uploads/1/3/2/6/132681634/040c19a0ce85e.pdf
    • http://fabiwix.billingspattern.com/uploads/1/3/0/7/130738799/1981943.pdf
    • http://files.stupindouscreations.com/uploads/1/3/0/7/130739831/fisudosomug_jogagane_bopebag.pdf
    • http://files.jeeeunhong.com/uploads/1/3/1/4/131408203/7efb7615677.pdf
    • https://cdn.shopify.com/s/files/1/0440/3986/4485/files/76581867862.pdf
    • https://cdn.shopify.com/s/files/1/0434/1704/3111/files/jefizikive.pdf
    • https://cdn.shopify.com/s/files/1/0438/9080/2856/files/bmtc_student_bus_pass_application_form.pdf
    • https://cdn.shopify.com/s/files/1/0432/2318/7616/files/papolodubebuzolefu.pdf
    • https://cdn.shopify.com/s/files/1/0431/6086/2874/files/assimilation_in_phonology.pdf
    • https://cdn.shopify.com/s/files/1/0428/1214/5823/files/42726028788.pdf
    • https://cdn.shopify.com/s/files/1/0428/2938/1791/files/9181119417.pdf
    • https://cdn.shopify.com/s/files/1/0428/2214/0063/files/administrative_procedure_act.pdf
    • https://cdn.shopify.com/s/files/1/0432/2505/5387/files/fidogijenijumuwaruk.pdf
    • https://cdn.shopify.com/s/files/1/0432/0090/5373/files/what_is_a_cia_file_ds.pdf
    • https://cdn.shopify.com/s/files/1/0432/1758/4283/files/zubururifobolotupi.pdf
    • https://cdn.shopify.com/s/files/1/0432/1925/5454/files/psychology_practice_test.pdf
    • https://cdn.shopify.com/s/files/1/0432/7620/6238/files/rexake.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_off00006955.bin
dd3148a5bbadae1feed1be049e6f3c6c037c0fb03f43db1a39b925e9a197f75d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6955 5276 bytes
font_01_sfnt_off00007b39.bin
6e470cce70e9b06c6b006862cfa439f5c8ca733857273be59f1bf3509cf7525e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B39 10196 bytes
font_02_sfnt_off00009e29.bin
b50a2106bf82917db0cd3cf88f63c5e8cc3298b343ace5cffc591b35df33d24c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9E29 4324 bytes

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