Malicious PDF — malware analysis report

Static analysis result for SHA-256 286a36a9fa2420e1…

MALICIOUS

PDF

47.3 KB Created: 2020-08-07 01:56:48 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e729365516567eeb56097b1f418c102 SHA-1: a7b3ee8c79fc72bb441772e0ed6c2293f0fab00c SHA-256: 286a36a9fa2420e16390a5c92e020c70e4a77a1797c60b3a8df76f8084da854c
120 Risk Score

Malware Insights

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

The PDF file contains a link farm and a malicious redirector. The document body, though heavily obfuscated, contains text that appears to be a lure for an 'English lesson plan'. The primary malicious URL, https://ttraff.ru/pify?keyword=english+lesson+plan+pdf+d.+el.+ed, is a known redirector. The file likely serves as a lure to redirect users to malicious content.

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.ru/pify?keyword=english+lesson+plan+pdf+d.+el.+ed
    • http://files.darkestsidesilver.com/uploads/1/3/1/4/131437123/94b384c2e9edca4.pdf
    • http://files.vinnysblogbookcom.com/uploads/1/3/0/9/130969358/wekofopekej_sobamejo.pdf
    • http://files.blainevdg.com/uploads/1/3/1/3/131384058/xijopasiwizul.pdf
    • http://files.thechildprotectioncenter.org/uploads/1/3/0/7/130740490/366152.pdf
    • https://cdn.shopify.com/s/files/1/0429/5327/7589/files/xikiwudarokiregubom.pdf
    • https://cdn.shopify.com/s/files/1/0429/2250/8454/files/kepisiwibutenenofemakize.pdf
    • https://cdn.shopify.com/s/files/1/0436/6660/4182/files/zipcode_dayton_ohio.pdf
    • https://cdn.shopify.com/s/files/1/0433/9597/3276/files/siveboxapavarobawuderupu.pdf
    • https://cdn.shopify.com/s/files/1/0428/6955/5359/files/2693521.pdf
    • https://cdn.shopify.com/s/files/1/0430/7111/1330/files/30443839118.pdf
    • https://cdn.shopify.com/s/files/1/0433/0536/9768/files/75918874136.pdf
    • https://cdn.shopify.com/s/files/1/0440/1538/6774/files/77098927566.pdf
    • https://cdn.shopify.com/s/files/1/0430/3467/3301/files/jorebegis.pdf
    • https://cdn.shopify.com/s/files/1/0435/1829/6232/files/tomigi.pdf
    • https://cdn.shopify.com/s/files/1/0428/6709/7756/files/jukamaserojeladixug.pdf
    • https://cdn.shopify.com/s/files/1/0437/7346/0641/files/lenorum.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005969.bin
a90bef18f69c9c689e96e9b10a1cb2f6c68b236e0e23986ae298c3e117552354		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5969 4904 bytes
font_01_sfnt_off00006a0d.bin
01cee101b5886fd9845c6fe2476f5029d86d4c00c47ee6081353d81cb749fb95		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6A0D 14004 bytes
font_02_sfnt_off00009611.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9611 4324 bytes
font_03_sfnt_off0000a412.bin
8421f32396998623d259c1a9d18a842f8e5fefd2effb6d80ae44cd7d1a9916a4		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA412 2864 bytes

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