Malicious PDF — malware analysis report

Static analysis result for SHA-256 ac2905e230da95d2…

MALICIOUS

PDF

50.7 KB Created: 2020-08-09 23:18:22 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: adae96f784ef9b78fa0202fb11a96ff2 SHA-1: 2ebf0d69c0a8739e6c60f98e573e5ca5e04b6801 SHA-256: ac2905e230da95d2f5890a4040fd0ff3ee822b707ebacb9d197ae01ab0a6ef1d
128 Risk Score

Malware Insights

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

The PDF file contains a link farm and a specific malicious redirector URL, indicating a phishing or scam attempt. The document body, though heavily obfuscated, contains references to educational material and the malicious URL, suggesting a lure to download or view content. The heuristic firings confirm the presence of a malicious redirector and a link farm, with one URL pointing to known malicious infrastructure.

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=brahmastra+advanced+maths+book+pdf
    • http://files.kapanshipman.com/uploads/1/3/1/6/131606122/jodezotodeja_xulovafepuginud.pdf
    • http://files.silverspoondinner.com/uploads/1/3/0/7/130740323/47d5d3d32ceb.pdf
    • http://files.virtualhomezone.com/uploads/1/3/2/7/132741486/608695.pdf
    • http://pozidene.thesocceridcamp.com/uploads/1/3/1/4/131408027/7271541.pdf
    • https://cdn.shopify.com/s/files/1/0432/1129/2829/files/aditya_hridayam_lyrics_tamil.pdf
    • https://cdn.shopify.com/s/files/1/0432/2482/6014/files/xiturixasegexoxowiwa.pdf
    • https://cdn.shopify.com/s/files/1/0437/7500/0730/files/chlamydia_adalah.pdf
    • https://cdn.shopify.com/s/files/1/0430/8221/9674/files/zetuze.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/16711599054.pdf
    • https://cdn.shopify.com/s/files/1/0433/7270/7990/files/5092253552.pdf
    • https://cdn.shopify.com/s/files/1/0431/7370/7925/files/catalogue_daikin_2020.pdf
    • https://cdn.shopify.com/s/files/1/0432/6519/6197/files/55072035321.pdf
    • https://cdn.shopify.com/s/files/1/0437/1811/5480/files/87713466477.pdf
    • https://cdn.shopify.com/s/files/1/0431/8127/7342/files/guliw.pdf
    • https://cdn.shopify.com/s/files/1/0430/0505/1029/files/purujefaxozowog.pdf
    • https://cdn.shopify.com/s/files/1/0429/9885/7891/files/46510955518.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_off0000608a.bin
f2cff13d457adb9eb30b6476aab26a00ddee62a577937f297519ec421c57da75		 pdf-font-stream PDF embedded font (sfnt) at offset 0x608A 5676 bytes
font_01_sfnt_off000073a4.bin
4390d46cab64c31557786a176fe1b7a68a9bb4abb85b28ba58735936f440d625		 pdf-font-stream PDF embedded font (sfnt) at offset 0x73A4 1972 bytes
font_02_sfnt_off00007d18.bin
d0321563c84bfedc451c3c85a2341fe3134b485a2566248b070eab237e1cd7e5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D18 9936 bytes
font_03_sfnt_off00009f67.bin
fb2392af7b44c21cd3f2b05c43b63a84b2a83474b884a2055382372c62ce33cd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9F67 8940 bytes

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