Malicious PDF — malware analysis report

Static analysis result for SHA-256 f058b916eafec637…

MALICIOUS

PDF

42.6 KB Created: 2020-08-24 12:52:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 718e3ae9d81216168ba66635060e343e SHA-1: b85239712342ccfa73c6181401f59a7182c58418 SHA-256: f058b916eafec6375a9167204185d2a8f6ca2a0cc3c8486a8e8706ccaa089fb3
128 Risk Score

Malware Insights

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

The PDF contains a link farm and a malicious redirector, indicating a lure to a malicious site. The presence of a 'download button' heuristic further supports this, suggesting the document's purpose is to trick the user into clicking a link. The primary malicious IOC is the redirector URL, which likely leads to further malicious content.

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.ru/pify?keyword=uc+browser+software++filehippo
    • http://files.hermistonraceway.com/uploads/1/3/1/3/131382243/xowatamekijopapaj.pdf
    • http://xuvelozu.southcentralsetac.com/uploads/1/3/1/3/131384609/bf8daf789c448c.pdf
    • http://files.southerncww.com/uploads/1/3/0/9/130969695/1454030.pdf
    • http://files.zenoacton.com/uploads/1/3/1/3/131383548/sozopetobem.pdf
    • https://cdn.shopify.com/s/files/1/0432/0883/5234/files/89301655123.pdf
    • https://cdn.shopify.com/s/files/1/0454/0271/8376/files/11197074628.pdf
    • https://cdn.shopify.com/s/files/1/0430/3224/8469/files/clinical_chemistry_bishop_8th_edition_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0432/5936/3488/files/92702929210.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/40233367396.pdf
    • https://cdn.shopify.com/s/files/1/0435/4405/1864/files/pulverizer_killing_floor_2.pdf
    • https://cdn.shopify.com/s/files/1/0437/7100/3037/files/2342453419.pdf
    • https://cdn.shopify.com/s/files/1/0434/4843/4840/files/wuduwiberedi.pdf
    • https://cdn.shopify.com/s/files/1/0432/5667/6510/files/9975993908.pdf
    • https://cdn.shopify.com/s/files/1/0434/5197/3794/files/secret_forex_hedging_strategy.pdf
    • https://cdn.shopify.com/s/files/1/0430/0334/7097/files/infrastructure_and_projects_authority_annual_report_2015.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_off00006907.bin
2fb2ea65a7ec39587fe3e031f79ac2dbd2bacf7bfb77d96931534bdf1398e3fa		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6907 5328 bytes
font_01_sfnt_off00007b26.bin
ca348b24042e1b8e97268426cf5b72de49f298dea77f9381ddc4474cc6419b33		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7B26 10128 bytes

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