Malicious PDF — malware analysis report

Static analysis result for SHA-256 22b11844fa8c6fca…

MALICIOUS

PDF

40.5 KB Created: 2020-08-05 08:45:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b384ff71847a8a0ed56f667f874710e8 SHA-1: 34b5b4ef531a636b934a4917b9b75e9429d27e6b SHA-256: 22b11844fa8c6fca9ab777d0d489dd787229787d03cf171be0660577791d36e6
150 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link pointing to 'ttraff.com'. This URL is presented to the user as an 'academic english pdf download' lure. The document also contains a large number of embedded links, many pointing to Shopify domains, suggesting a link farm for SEO manipulation or to obscure the final malicious destination. No scripts were extracted from this sample.

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=academic+english+pdf+download
    • http://files.laurielotus.com/uploads/1/3/1/8/131856827/5448411.pdf
    • http://files.musicultinc.com/uploads/1/3/0/8/130873921/nesomibitege_dobeniw_vutatimorukebef_bogadedikapip.pdf
    • http://files.anniepoole.com/uploads/1/3/2/6/132682802/41a1a888.pdf
    • http://zijarog.anniesullivanband.com/uploads/1/3/0/7/130740249/rojudulun_numedezex.pdf
    • https://cdn.shopify.com/s/files/1/0434/0121/6163/files/28516661810.pdf
    • https://cdn.shopify.com/s/files/1/0432/8115/4214/files/zibuzifawofuvep.pdf
    • https://cdn.shopify.com/s/files/1/0437/8463/4530/files/ginerikowapudevereguzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2246/6720/files/21299536952.pdf
    • https://cdn.shopify.com/s/files/1/0431/1282/4993/files/bepuwotitelorun.pdf
    • https://cdn.shopify.com/s/files/1/0431/3799/0805/files/neoplasia_endocrina_multipla_tipo_1.pdf
    • https://cdn.shopify.com/s/files/1/0429/4115/3439/files/72437979876.pdf
    • https://cdn.shopify.com/s/files/1/0427/7754/2823/files/xurazolagipamofodofumat.pdf
    • https://cdn.shopify.com/s/files/1/0428/4098/1660/files/58759261001.pdf
    • https://cdn.shopify.com/s/files/1/0431/2468/7014/files/namerawuvogabuwefilaxug.pdf
    • https://cdn.shopify.com/s/files/1/0429/3004/5084/files/raxat.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_off00005fd5.bin
0c82fdaacfd7a8e368f0b43994d6e80b020c879095e208d5bfd1681b2312172d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5FD5 5552 bytes
font_01_sfnt_off000072aa.bin
5e51813184d862f04e4c7bcae3781def1faf962ee0cb6ffed0cb578bbe149596		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72AA 10176 bytes

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