Malicious PDF — malware analysis report

Static analysis result for SHA-256 ecdfa641f808d631…

MALICIOUS

PDF

40.7 KB Created: 2020-08-25 06:02:14 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b85858eeb7d67eabc4adbe8c4610116e SHA-1: d5311608e30680b1dcddc2969a7d1286b5b22bbf SHA-256: ecdfa641f808d63146e19260b6b8f8ed47090b95cae7451856fcffa11a6b67b4
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a download for a "Speed er app for pc". The document also features a large number of embedded links, many pointing to shopify.com, suggesting a link farm or SEO manipulation tactic to distribute the malicious payload. The ML classifier strongly supports the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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/pify?keyword=speed+er+app+for+pc
    • http://mamuvoja.store.wssbadminton.com/uploads/1/3/1/1/131164447/vuxipegizakufabej.pdf
    • http://files.iainrobinson.online/uploads/1/3/1/4/131438151/3cec1d80955da.pdf
    • http://memamun.mallahdivinemallah.com/uploads/1/3/2/3/132303027/cef0a2a467dc00e.pdf
    • http://sojemevek.saritaredalia.com/uploads/1/3/1/0/131070719/xegagevarireto-sejurar-ladoji-xonito.pdf
    • https://cdn.shopify.com/s/files/1/0431/0876/1751/files/84440971957.pdf
    • https://cdn.shopify.com/s/files/1/0434/0760/5923/files/85740020895.pdf
    • https://cdn.shopify.com/s/files/1/0436/5385/7433/files/action_plan_worksheet.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/zivarezid.pdf
    • https://cdn.shopify.com/s/files/1/0457/4923/9964/files/gonda_junction_platform_number_3.pdf
    • https://cdn.shopify.com/s/files/1/0429/5737/3589/files/74824140064.pdf
    • https://cdn.shopify.com/s/files/1/0434/6642/4486/files/ff14_best_dps.pdf
    • https://cdn.shopify.com/s/files/1/0433/2797/9678/files/65568673559.pdf
    • https://cdn.shopify.com/s/files/1/0430/3051/1779/files/dadowawedebuzutuzijilume.pdf
    • https://cdn.shopify.com/s/files/1/0432/8597/1110/files/migowogobemo.pdf
    • https://cdn.shopify.com/s/files/1/0431/1498/7674/files/godetoporekeniwot.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/lagofenavixadoje.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_off00006249.bin
8c01b34bc28c5d3a53d4d64c11487361b17d0af0a5b082f1c2d9019e66d560e1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6249 5044 bytes
font_01_sfnt_off0000737e.bin
48ffd64dcf302b8fc3ab35646f5d48e761e590398c106f57d26fa19f3b2b19d3		 pdf-font-stream PDF embedded font (sfnt) at offset 0x737E 10128 bytes

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