Malicious PDF — malware analysis report

Static analysis result for SHA-256 ad81f1af000efac0…

MALICIOUS

PDF

41.2 KB Created: 2020-08-20 10:01:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: aec0850f2a4f142c86b829b87dfd4247 SHA-1: 7def7510ddd288079976b07cb8d87fc180e4dd84 SHA-256: ad81f1af000efac042ec58ed824873207e88532148953a134244184129fa4581
150 Risk Score

Malware Insights

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

The PDF contains a mass of external links, with one prominent link redirecting to a known malicious infrastructure. The document body, though heavily obfuscated, contains the URL 'https://ttraff.ru/pify?keyword=rectification+in+physics+pdf', which is flagged as a malicious redirector. This suggests the document's primary purpose is to redirect users to malicious content, likely for phishing or malware distribution.

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/pify?keyword=rectification+in+physics+pdf
    • http://files.servantconferences.com/uploads/1/3/0/8/130874520/9804619.pdf
    • http://remum.centerpointschool.org/uploads/1/3/1/1/131164250/bazomokowijuvif.pdf
    • http://lexip.peomna.org/uploads/1/3/1/1/131164250/2133172.pdf
    • http://kugivivog.ritecookware.com/uploads/1/3/1/4/131453960/f43badd.pdf
    • http://files.schuttvision.com/uploads/1/3/0/7/130738822/4775714.pdf
    • https://cdn.shopify.com/s/files/1/0431/6702/3259/files/37419422208.pdf
    • https://cdn.shopify.com/s/files/1/0429/7146/3831/files/pilivimerosojedavefuk.pdf
    • https://cdn.shopify.com/s/files/1/0428/3564/0476/files/kewuniloti.pdf
    • https://cdn.shopify.com/s/files/1/0431/6332/0471/files/jexukapojubojuxu.pdf
    • https://cdn.shopify.com/s/files/1/0437/0956/3034/files/access_fine_location_permission_android_6.pdf
    • https://cdn.shopify.com/s/files/1/0438/4302/7106/files/sojepurabapij.pdf
    • https://cdn.shopify.com/s/files/1/0438/2598/7734/files/86164935466.pdf
    • https://cdn.shopify.com/s/files/1/0432/4796/0232/files/power_function_c.pdf
    • https://cdn.shopify.com/s/files/1/0431/3183/0421/files/27737988724.pdf
    • https://cdn.shopify.com/s/files/1/0428/2191/0687/files/12767822120.pdf
    • https://cdn.shopify.com/s/files/1/0434/5833/0786/files/enable_trim_yosemite.pdf
    • https://cdn.shopify.com/s/files/1/0439/0758/0072/files/xatiwoziketeludif.pdf
    • https://cdn.shopify.com/s/files/1/0436/3298/4222/files/90221325465.pdf
    • https://cdn.shopify.com/s/files/1/0430/8097/4490/files/b_pharmacy_syllabus_download.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_off0000610e.bin
3ab81e8c5428e1556b839e67a9dfa695e0b64ab4f8eba11ef0f51e1f63fbb9c9		 pdf-font-stream PDF embedded font (sfnt) at offset 0x610E 5224 bytes
font_01_sfnt_off000072db.bin
831674425399c947122ed645bd38f3fc9b0bdd4dcf0ec76f680e942b8ff1e26c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x72DB 10404 bytes

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