Malicious PDF — malware analysis report

Static analysis result for SHA-256 b7b429880d0cd092…

MALICIOUS

PDF

115.2 KB Created: 2020-09-02 00:21:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6359dd8e6ac41bd60f3407a354536d65 SHA-1: 328d1f3e741bacb30981a94cbac902c58f347208 SHA-256: b7b429880d0cd092a9066c56e6d0cc18ee15df2d8d4d15ba3c70518397205205
120 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF file contains a mass external link farm, with many links pointing to PDFs hosted on cdn.shopify.com and static.usrfiles.com. One critical heuristic firing indicates a PDF link to known malicious redirector infrastructure at 'ttraff.ru'. The document body, though heavily obfuscated, contains text related to a 'Lakeland ledger fishing report' and the malicious URL, suggesting a lure. The presence of numerous links and the redirector URL strongly indicate an attempt to direct the user to a malicious site.

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=lakeland+ledger+fishing+report
    • https://static.usrfiles.com/ugd/b8c837_1a844f21c1624ec0968bceebf0a1ccdb.pdf
    • https://static.usrfiles.com/ugd/de60da_47c95ccc6f7d4ffba91fca9d8cf170af.pdf
    • https://static.usrfiles.com/ugd/b6edda_180a9c961a234979b7f8568eb9bc46fb.pdf
    • https://static.usrfiles.com/ugd/197ed4_f70d9f09714843dc976810cc7a5a4ea8.pdf
    • https://static.usrfiles.com/ugd/a2e20a_6ee19c4306ae4a8f832baff6a0978c4c.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/53522836856.pdf
    • https://cdn.shopify.com/s/files/1/0427/5775/0951/files/5088454617.pdf
    • https://cdn.shopify.com/s/files/1/0440/5955/8053/files/biopsychology_by_pinel.pdf
    • https://cdn.shopify.com/s/files/1/0435/4555/9189/files/fakofa.pdf
    • https://cdn.shopify.com/s/files/1/0433/7251/1386/files/jurnal_asia_tenggara.pdf
    • https://cdn.shopify.com/s/files/1/0431/0335/5034/files/48171050663.pdf
    • https://cdn.shopify.com/s/files/1/0430/7868/0727/files/34699950437.pdf
    • https://cdn.shopify.com/s/files/1/0429/6183/0037/files/causative_exercises_advanced.pdf
    • https://cdn.shopify.com/s/files/1/0427/5198/3772/files/filibovumugukil.pdf
    • https://cdn.shopify.com/s/files/1/0435/0056/8736/files/gelogepazawumukoz.pdf
    • https://cdn.shopify.com/s/files/1/0432/7342/0965/files/parallel_lines_and_transversals_worksheet_echalk.pdf
    • https://cdn.shopify.com/s/files/1/0433/8722/4213/files/gabopezeputejimuvegol.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_off000188d1.bin
1ce4de9fc9a4ec352fe067bd39b7023515c94ba90fd65d974268b52e7437f8e7
pdf-font-stream PDF embedded font (sfnt) at offset 0x188D1 5308 bytes
font_01_sfnt_off00019ae5.bin
672987399f4e74566d1019e2aa552d8ff3433c98cced585f714d7ea9c0c8ab49
pdf-font-stream PDF embedded font (sfnt) at offset 0x19AE5 10688 bytes