Malicious PDF — malware analysis report

Static analysis result for SHA-256 a0835b1597d90579…

MALICIOUS

PDF

43.7 KB Created: 2020-08-09 00:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 77b3e9c23fd9cb0b8a0ec0276c91f46f SHA-1: cf0b3399d62f0766d51ba822dcf076cfbef1fd15 SHA-256: a0835b1597d90579013a9fe8f12b0cd87097dfbe8d18f81e6b0d3f1127dce01f
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic identifying a link to a known malicious redirector at https://ttraff.cc/pify. The document body, though heavily obfuscated, contains text suggesting it is a tutorial PDF, which is likely a lure. The presence of a link farm heuristic further indicates a malicious intent to redirect users to external sites.

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=backtrack+5+complete+tutorial+pdf
    • http://files.masoncitychristian.org/uploads/1/3/0/7/130739204/muredewapojujew.pdf
    • http://files.ausportsweakly.com/uploads/1/3/1/4/131453560/pawak.pdf
    • http://files.eloridesign.com/uploads/1/3/1/4/131437873/wuxapalunir-tokopuperu.pdf
    • http://files.artsandculturematter.com/uploads/1/3/1/8/131871909/nimazerolol.pdf
    • https://cdn.shopify.com/s/files/1/0431/6341/8784/files/kirifatakiwonoforuge.pdf
    • https://cdn.shopify.com/s/files/1/0432/7014/4166/files/70607162795.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/9525543421.pdf
    • https://cdn.shopify.com/s/files/1/0430/4135/7973/files/retidozubup.pdf
    • https://cdn.shopify.com/s/files/1/0431/0587/8170/files/tukobex.pdf
    • https://cdn.shopify.com/s/files/1/0437/7988/3170/files/16240945469.pdf
    • https://cdn.shopify.com/s/files/1/0428/5346/6271/files/sukerosazibajebav.pdf
    • https://cdn.shopify.com/s/files/1/0434/5102/3526/files/38514419781.pdf
    • https://cdn.shopify.com/s/files/1/0437/9767/6192/files/risaponarisi.pdf
    • https://cdn.shopify.com/s/files/1/0434/7432/1560/files/20869909316.pdf
    • https://cdn.shopify.com/s/files/1/0436/2112/2211/files/20445042752.pdf
    • https://cdn.shopify.com/s/files/1/0429/3191/2857/files/ximasuxitu.pdf
    • https://cdn.shopify.com/s/files/1/0430/9676/8673/files/japozelomawididimik.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_off00006daf.bin
56a81dc6b955bb3381291e0196f943d93bdc6709a14b0aa2f2da15866320a9ee		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6DAF 5360 bytes
font_01_sfnt_off00007fdd.bin
30d4f3aa84394507776d0b6c8c306b938081c6e93fc28829323d548a52f716ea		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7FDD 9920 bytes

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