Malicious PDF — malware analysis report

Static analysis result for SHA-256 a7ce4dcb5a2191cf…

MALICIOUS

PDF

39.0 KB Created: 2020-08-18 18:02:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8762e388b9160418bb551520c74d8da3 SHA-1: 1291957c5d791c0d32938ef51897cdd36b8627f5 SHA-256: a7ce4dcb5a2191cf81db2146896529611426bd0ff55df0c4cf5fd55da7d42216
120 Risk Score

Malware Insights

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

The PDF document 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, however, directs to a known malicious redirector at ttraff.ru. This suggests the document is designed to funnel users through a series of redirects, likely to a malicious site or for SEO poisoning. No scripts were extracted from this sample.

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=handwriting+practice+sheets+free
    • http://modis.joiedevivresantafe.com/uploads/1/3/1/6/131637218/dufositejid.pdf
    • http://files.sewtruestudio.com/uploads/1/3/2/6/132680931/nufurudifuti_taregutolomem.pdf
    • http://xanig.anroflowers.co.za/uploads/1/3/0/7/130776330/4085999.pdf
    • http://files.jewishchristianstudiescenter.org/uploads/1/3/2/7/132740234/78940740.pdf
    • http://files.infocartoons.com/uploads/1/3/0/9/130969372/b94406ddbabca.pdf
    • https://cdn.shopify.com/s/files/1/0437/5448/7969/files/60640235720.pdf
    • https://cdn.shopify.com/s/files/1/0429/9712/1178/files/92559525253.pdf
    • https://cdn.shopify.com/s/files/1/0437/6766/0706/files/49947742923.pdf
    • https://cdn.shopify.com/s/files/1/0437/1084/1000/files/38255023302.pdf
    • https://cdn.shopify.com/s/files/1/0433/3443/4969/files/retizikokefabizomasis.pdf
    • https://cdn.shopify.com/s/files/1/0430/0419/9075/files/97396742317.pdf
    • https://cdn.shopify.com/s/files/1/0431/7016/8992/files/lic_jeevan_lakshya.pdf
    • https://cdn.shopify.com/s/files/1/0437/5583/1445/files/94396181878.pdf
    • https://cdn.shopify.com/s/files/1/0429/2263/9527/files/nidowufe.pdf
    • https://cdn.shopify.com/s/files/1/0433/1870/6341/files/71814149877.pdf
    • https://cdn.shopify.com/s/files/1/0428/6241/1935/files/koganujanurusupedemod.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_off00005972.bin
7698450a891612ace2d2aea7605b618df0cd113aa2e21031513e3ef59a6c8753		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5972 5440 bytes
font_01_sfnt_off00006bfa.bin
2b52d7982b4b128e1b674a88fd5e21a608fc2471777654349c2a40c7e355f078		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6BFA 10228 bytes

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