Malicious PDF — malware analysis report

Static analysis result for SHA-256 4188a02e656bf4c8…

MALICIOUS

PDF

43.0 KB Created: 2020-08-30 23:00:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 62bfb238426f6a2c3a17e3dc16b53c51 SHA-1: b1b106667a1141282639842978d995b6fa724b4c SHA-256: 4188a02e656bf4c8629ab8b045bf0eb417d7b9155b2bdbf85a486328368129dd
120 Risk Score

Malware Insights

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

The PDF file was generated by wkhtmltopdf and contains numerous embedded links. One of these links, 'https://ttraff.ru/wix?keyword=orange+is+the+new+black+pdf', is identified as a malicious redirector. The majority of the embedded links point to a link farm hosted on cdn.shopify.com, likely an attempt to manipulate search engine results. No scripts were extracted, and the document body is heavily obfuscated, but the presence of the malicious redirector and the link farm strongly suggests a malicious intent, likely for SEO poisoning or to lure users to malicious 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.ru/wix?keyword=orange+is+the+new+black+pdf
    • https://cdn.shopify.com/s/files/1/0438/8729/6680/files/dmv_ny_forms.pdf
    • https://cdn.shopify.com/s/files/1/0435/8176/7841/files/hepatic_encephalopathy.pdf
    • https://cdn.shopify.com/s/files/1/0428/9200/1433/files/pokemasujakiwew.pdf
    • https://cdn.shopify.com/s/files/1/0433/3027/3448/files/raxudiwi.pdf
    • https://cdn.shopify.com/s/files/1/0431/7990/1096/files/2005_chrysler_pacifica_shop_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_46e0c58e1bab46e691f51630ab7c73a6.pdf
    • https://static.usrfiles.com/ugd/7baf93_95a277490c7e497da22a72a93efb3de5.pdf
    • https://static.usrfiles.com/ugd/b8c837_70e854ce6a3d4db89aedaaf136a267a3.pdf
    • https://static.usrfiles.com/ugd/a382ee_ed26088e3fbc4a80b715a13e83ce3800.pdf
    • https://cdn.shopify.com/s/files/1/0433/0474/7168/files/jetufar.pdf
    • https://cdn.shopify.com/s/files/1/0430/2438/4154/files/lamagube.pdf
    • https://cdn.shopify.com/s/files/1/0433/8994/3971/files/kixederomuwajolisuniludit.pdf
    • https://cdn.shopify.com/s/files/1/0435/1744/4264/files/viparatafedo.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/autoimmune_thyroid_disorders.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/chiedere_in_inglese_formale.pdf
    • https://cdn.shopify.com/s/files/1/0434/0449/2957/files/86593570969.pdf
    • https://cdn.shopify.com/s/files/1/0435/8871/4653/files/97696199884.pdf
    • https://cdn.shopify.com/s/files/1/0470/8735/4014/files/kimog.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_off0000691e.bin
bbd0155dd72ab3262b146d60c85eaf8221c9c514d0f2dc2c0581bdd2c3834dd1
pdf-font-stream PDF embedded font (sfnt) at offset 0x691E 5740 bytes
font_01_sfnt_off00007cad.bin
f271ecda44d28beb9c571880e29edd7c87bfb0b3e64338735680b8ac0a50fbe4
pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAD 10060 bytes