Malicious PDF — malware analysis report

Static analysis result for SHA-256 3d18dcda42262acb…

MALICIOUS

PDF

49.5 KB Created: 2020-08-10 04:39:55 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 4854906ed6cb1d1718e182d10330b54e SHA-1: 1ba9002f6a20b42d0233ad8f69847bc8ac2809e9 SHA-256: 3d18dcda42262acbb6053b48b3141a720d308380ab8287bd0859a8c5d0f74ba7
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on cdn.shopify.com. One of the primary links, 'https://ttraff.ru/pify?keyword=absorcion+hierro+pdf', is identified as a malicious redirector. This suggests the document's purpose is to direct users through a chain of links, ultimately leading to a malicious site, while obscuring the final destination through the link farm.

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=absorcion+hierro+pdf
    • http://files.arlingtontherapyalliance.com/uploads/1/3/0/7/130775197/luvoluw.pdf
    • http://files.whisperingdoveranch.com/uploads/1/3/1/4/131455680/2b393511b942bd.pdf
    • http://lajagagex.collaborativeteachersinstitute.com/uploads/1/3/0/7/130776257/kiletuku-mibapaxejutebus.pdf
    • https://cdn.shopify.com/s/files/1/0447/8930/1409/files/animorphs_book_19.pdf
    • https://cdn.shopify.com/s/files/1/0439/8841/8718/files/lezikoterusuwekubusivelis.pdf
    • https://cdn.shopify.com/s/files/1/0429/7303/6697/files/dirks_castes_of_mind.pdf
    • https://cdn.shopify.com/s/files/1/0433/3538/5243/files/28038087408.pdf
    • https://cdn.shopify.com/s/files/1/0428/4930/4732/files/pufigadewovomevebanaves.pdf
    • https://cdn.shopify.com/s/files/1/0435/0902/2886/files/kuluked.pdf
    • https://cdn.shopify.com/s/files/1/0431/2875/0234/files/14464623247.pdf
    • https://cdn.shopify.com/s/files/1/0432/7941/7504/files/voxuwomosijugelokatox.pdf
    • https://cdn.shopify.com/s/files/1/0429/6481/1927/files/19038430182.pdf
    • https://cdn.shopify.com/s/files/1/0433/9240/1566/files/bank_note_press_recruitment_2020.pdf
    • https://cdn.shopify.com/s/files/1/0431/7652/5984/files/nutiros.pdf
    • https://cdn.shopify.com/s/files/1/0436/9108/1882/files/kedimeno.pdf
    • https://cdn.shopify.com/s/files/1/0434/7982/6589/files/honey_bee_castes.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_off0000787b.bin
e753e3ab7db4e005c798078c6719815fa2f2ba58f7d080bf5188bed3853ee3d1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x787B 5132 bytes
font_01_sfnt_off000089eb.bin
fcdfea6df569cec0eca0ea97c72bc704efd2bf973c28540e34943096fb44236f		 pdf-font-stream PDF embedded font (sfnt) at offset 0x89EB 15244 bytes

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