Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c22d95fd7ee98f…

MALICIOUS

PDF

36.5 KB Created: 2020-09-02 02:43:12 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 001ebcb28cbf9cd40eef57e5863a7351 SHA-1: dfcfce4205f4aeb38dc6392900b35332e54d7ceb SHA-256: e3c22d95fd7ee98fb443f700681f765c1d477880e1686e877f5baddae79274d2
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.ru. This URL is embedded within the document body, disguised as a search result for 'burgundy formal dresses plus size'. The PDF also exhibits characteristics of a link farm, with numerous embedded URLs, many hosted on cdn.shopify.com, though the primary redirector is malicious. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector is sufficient evidence of a phishing or redirection attempt.

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.ru/wix?keyword=burgundy+formal+dresses+plus+size
    • https://cdn.shopify.com/s/files/1/0437/5370/1525/files/liveputubali.pdf
    • https://cdn.shopify.com/s/files/1/0430/0364/2007/files/isometric_view_in_autocad.pdf
    • https://cdn.shopify.com/s/files/1/0435/7583/6840/files/24907582463.pdf
    • https://cdn.shopify.com/s/files/1/0428/4160/4263/files/learn_excel_formulas.pdf
    • https://cdn.shopify.com/s/files/1/0430/1042/4993/files/witekujapuzusogunuseziz.pdf
    • https://cdn.shopify.com/s/files/1/0430/7743/5556/files/download_single_file_from_github.pdf
    • https://cdn.shopify.com/s/files/1/0432/1266/9089/files/allahabad_state_university_admit_card_2019.pdf
    • https://cdn.shopify.com/s/files/1/0440/5493/7765/files/retemuzu.pdf
    • https://cdn.shopify.com/s/files/1/0432/2977/3981/files/beluxizawatek.pdf
    • https://static.usrfiles.com/ugd/b8c837_283e40783a034a528e2f92a6d43a4b39.pdf
    • https://static.usrfiles.com/ugd/b8c837_ffcf01150f0145d18cebd8673360b413.pdf
    • https://static.usrfiles.com/ugd/0b46e6_75829c5550e24e1a81cbfd9e1a1d4546.pdf
    • https://static.usrfiles.com/ugd/c81504_2142bfee290f4ae892b34288be068dc1.pdf
    • https://static.usrfiles.com/ugd/8e1900_c1593b3390934df997ef34bc61ee5246.pdf
    • https://static.usrfiles.com/ugd/0cd3a8_72d8014f8e23400a9c9360f4f5bf5027.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_off00005116.bin
2860c6bad75082f3dbd26b100bbe170a42da9b2f37f69d96c5485fec6edce78a
pdf-font-stream PDF embedded font (sfnt) at offset 0x5116 5560 bytes
font_01_sfnt_off00006406.bin
aef598a78e4515926bec667080385acd4f94a6cb55162239f1b0501f72de17ee
pdf-font-stream PDF embedded font (sfnt) at offset 0x6406 9816 bytes