Malicious PDF — malware analysis report

Static analysis result for SHA-256 f6191f178858346c…

MALICIOUS

PDF

35.6 KB Created: 2020-09-18 02:21:06 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: acf9daddc14d0b41a81f655a7164f917 SHA-1: 738511869028affe93b841fc0b475c65e437a886 SHA-256: f6191f178858346ccd88d1f36fadfe9b17bd42a9943be2a99fa98227e56450b0
128 Risk Score

Malware Insights

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

The PDF file contains a heuristic firing for a malicious redirector link, which is also present in the document body. This link is designed to lure users into clicking it, likely leading to a malicious download or further compromise. The file also contains a large number of embedded links, many of which point to benign PDF files, suggesting a link farm or SEO poisoning tactic to obscure the malicious redirector.

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.link/wix?keyword=polk+psw108+manual
    • https://615405c9-4dc6-4476-880a-55da96ca8141.filesusr.com/ugd/237bf7_b9fcc88c632d4d5bb559561d9b010c26.pdf?index=true
    • https://39d3ff81-6079-4251-99fe-d60c793e6a42.filesusr.com/ugd/0789d5_11a4fa9b00764791a90e1b91aab36ec5.pdf?index=true
    • https://9a8476f6-46c9-46f4-afb8-adc9f1490be7.filesusr.com/ugd/d01287_275a3cb4a3c444a0afdd262de718d905.pdf?index=true
    • https://f3a5e5fe-af75-40a7-ada1-f5e4feca8e81.filesusr.com/ugd/0bfb20_35896df0109045adb4e265407b84e4e7.pdf?index=true
    • https://95c262c8-92b9-4f10-81e0-ebba5f630420.filesusr.com/ugd/96768c_b05bd585b3fc416e9e3ea9d1eb322c59.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0434/5338/2822/files/average_speed_by_country.pdf
    • https://cdn.shopify.com/s/files/1/0434/3706/4348/files/25173953306.pdf
    • https://cdn.shopify.com/s/files/1/0433/2532/5467/files/banwell_mccash_spectroscopy.pdf
    • https://cdn.shopify.com/s/files/1/0458/0786/1926/files/comptia_project_study_guide_2nd_edition.pdf
    • https://cdn.shopify.com/s/files/1/0432/2145/0914/files/32031108915.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/lojuxefututa.pdf
    • https://cdn.shopify.com/s/files/1/0438/7287/8747/files/50531358424.pdf
    • https://cdn.shopify.com/s/files/1/0429/8748/7395/files/10th_class_math_solution_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5356/files/78517557721.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_off00004d3c.bin
b619e1c6951c96ca3a2316fcd58c8089c0ac831aabe15bae5e44ef8cc3c35124
pdf-font-stream PDF embedded font (sfnt) at offset 0x4D3C 5416 bytes
font_01_sfnt_off00005fb2.bin
fc868f0a68a8b926bff5d844f74a3046723ddeee1bfb4bd4dac1bda92a073fca
pdf-font-stream PDF embedded font (sfnt) at offset 0x5FB2 9980 bytes