Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea278492365d5dc5…

MALICIOUS

PDF

61.0 KB Created: 2020-08-13 23:16:51 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d08f03862ce3f79841abfa6cefa5378 SHA-1: a93ea2885c27c8ebe521284dd9f0d7c5677f63fb SHA-256: ea278492365d5dc508e9382278574b8a1b45a0a011e81731a9c652c638704e99
120 Risk Score

Malware Insights

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

The PDF file contains a critical heuristic indicating it links to a known malicious redirector. The document body, though partially corrupted, contains the URL 'https://ttraff.cc/pify?keyword=shin+chan+tamil+free', which is the primary indicator of malicious intent. The file also exhibits characteristics of a link farm, with numerous embedded links pointing to external PDFs, likely for SEO manipulation or to obscure the malicious redirector.

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.cc/pify?keyword=shin+chan+tamil+free
    • http://files.sarahscustomtumblers.com/uploads/1/3/0/8/130874254/tisinun.pdf
    • http://files.neilmccarthypoetry.com/uploads/1/3/0/7/130739621/vejezofefajuvofoxu.pdf
    • http://files.viewsonbrews.com/uploads/1/3/2/7/132740584/rogavararizog-nizila-gezim-sipepep.pdf
    • http://files.thebetterbrasspipe.com/uploads/1/3/2/7/132740218/daf3e1d8396c143.pdf
    • http://files.partybartendersandwaiters.com/uploads/1/3/0/7/130776864/b27975.pdf
    • https://cdn.shopify.com/s/files/1/0432/8289/0912/files/89720828413.pdf
    • https://cdn.shopify.com/s/files/1/0428/2161/5775/files/60159474657.pdf
    • https://cdn.shopify.com/s/files/1/0432/8180/9558/files/30068827772.pdf
    • https://cdn.shopify.com/s/files/1/0435/5286/6467/files/book_review.pdf
    • https://cdn.shopify.com/s/files/1/0439/1629/6360/files/40928087119.pdf
    • https://cdn.shopify.com/s/files/1/0437/8312/7201/files/xerojonafidesabareniv.pdf
    • https://cdn.shopify.com/s/files/1/0428/4284/9446/files/23217921.pdf
    • https://cdn.shopify.com/s/files/1/0430/4453/6473/files/normalize_numpy_array.pdf
    • https://cdn.shopify.com/s/files/1/0432/6309/9040/files/fitexexifude.pdf
    • https://cdn.shopify.com/s/files/1/0429/5308/0991/files/fiwimikubutunipawasos.pdf
    • https://cdn.shopify.com/s/files/1/0432/5651/2680/files/69193304912.pdf
    • https://cdn.shopify.com/s/files/1/0431/6318/9412/files/thats_my_purse.pdf
    • https://cdn.shopify.com/s/files/1/0428/1312/8867/files/numitog.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 5

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005f53.bin
9a9bc8e7d0c61bb353d8ff3a53f7c80a13acf7f8c646e2c12b8ca266dddf9035		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5F53 6912 bytes
font_01_sfnt_off000076f0.bin
e4392e0699443a5fc5ae604a99a97fe2ec6ac1b1be3355409e8e0070e5eb4ec5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x76F0 5044 bytes
font_02_sfnt_off000087d5.bin
9648b7f773b4c6351c4c892543f7dbf6944c1447eda44ff9816f17e3eb026d29		 pdf-font-stream PDF embedded font (sfnt) at offset 0x87D5 9160 bytes
font_03_sfnt_off0000a5fd.bin
6257831145377f1539d382a4290e2f4b17d5c3516ff9c5dfd83f3498c1392f66		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA5FD 10668 bytes
font_04_sfnt_off0000ca75.bin
4931a61266f3e7a6f712058ac436dff1ba0d7ff898450f3c3958ddad04789006		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA75 17428 bytes

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