Malicious PDF — malware analysis report

Static analysis result for SHA-256 4d93f0735af60c29…

MALICIOUS

PDF

34.3 KB Created: 2020-09-17 05:39:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 3a3b5dbfd2c1721ccc94a2bc82dbf873 SHA-1: 0f5ec4c7bb0b32e1b5c40c969e2193d6585814cc SHA-256: 4d93f0735af60c295c9fe50b1dda7a0e33b99cc3ef6f679536862afb82abff0a
128 Risk Score

Malware Insights

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

The PDF contains a heuristic firing for a malicious redirector link, pointing to ttraff.club. It also exhibits characteristics of a link farm, with numerous external PDF links, many hosted on cdn.shopify.com. The document body, though partially corrupted, contains the same lure text as the malicious URL, suggesting an attempt to trick users into downloading a file via a malicious redirector. No scripts were extracted from this sample.

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.club/wix?keyword=franklin+barbecue+a+meat-smoking+manifesto+pdf+download
    • http://files.mermaidsutra.net/uploads/1/3/0/7/130739713/kulixo.pdf
    • http://zilefu.beechcheerleading.com/uploads/1/3/1/4/131406827/xilezoj-disonimakovabu.pdf
    • http://files.413records.com/uploads/1/3/1/4/131406288/vetumikoma-rowoga-vapedufemuxu-vebexukobar.pdf
    • https://cdn.shopify.com/s/files/1/0431/2150/8506/files/dabif.pdf
    • https://cdn.shopify.com/s/files/1/0458/2594/9859/files/you_raise_me_up_secret_garden.pdf
    • https://cdn.shopify.com/s/files/1/0433/2906/1032/files/intertek_electric_fireplace_manual.pdf
    • https://cdn.shopify.com/s/files/1/0434/0734/3772/files/levubebonawujire.pdf
    • https://cdn.shopify.com/s/files/1/0431/7973/7237/files/43727127778.pdf
    • https://cdn.shopify.com/s/files/1/0432/6440/9755/files/fututo.pdf
    • https://cdn.shopify.com/s/files/1/0431/0253/5840/files/92873562462.pdf
    • https://cdn.shopify.com/s/files/1/0434/5944/4896/files/28423092436.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/abbyy_fine_reader_software.pdf
    • https://cdn.shopify.com/s/files/1/0428/5900/4070/files/vuder.pdf
    • https://cdn.shopify.com/s/files/1/0436/5955/9065/files/vue_element_admin_template.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_off000046db.bin
5c5013fded4d67201745c8a49a8d2aac96b0ba3e41549de17d5bbb50aa8afd65
pdf-font-stream PDF embedded font (sfnt) at offset 0x46DB 5760 bytes
font_01_sfnt_off00005a79.bin
804be00b0591a48e3105b646dd6e1638be502dc0a7be2f927c766ff4e0456757
pdf-font-stream PDF embedded font (sfnt) at offset 0x5A79 9900 bytes