Malicious PDF — malware analysis report

Static analysis result for SHA-256 f9805fe6be543435…

MALICIOUS

PDF

44.7 KB Created: 2020-09-02 21:37:13 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 8d464a7c0e962834739e748130884201 SHA-1: c752b797f013e35478c75ad52a08276c5df62c8e SHA-256: f9805fe6be543435d7e2bca6fd3487ac94a61cbba209a816977d1710295cdd26
120 Risk Score

Malware Insights

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

The PDF file contains numerous embedded links, with a critical heuristic firing indicating a malicious redirector. The document body, though heavily obfuscated, contains text related to 'alvin and the chipmunks' and a URL pointing to a malicious redirector. This suggests a social engineering lure to drive traffic to malicious infrastructure.

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.me/wix?keyword=film+kartun+alvin+and+the+chipmunks
    • https://static.usrfiles.com/ugd/b8c837_f453484c0fce4c15bf2363b5383b5521.pdf
    • https://static.usrfiles.com/ugd/a640e9_99a0f471896243eb82e93f2530516a1a.pdf
    • https://static.usrfiles.com/ugd/0c4177_884e4903ffd14a65a66adb84e964e5d3.pdf
    • https://static.usrfiles.com/ugd/b8c837_58c0e2677d264bdfb97c9b6145d5f366.pdf
    • https://cdn.shopify.com/s/files/1/0428/5382/6726/files/clash_of_clans_apk_oyun_indir.pdf
    • https://cdn.shopify.com/s/files/1/0429/8617/6675/files/xusibopuweledivu.pdf
    • https://cdn.shopify.com/s/files/1/0433/9931/5619/files/makiga.pdf
    • https://cdn.shopify.com/s/files/1/0431/0191/3244/files/49445526298.pdf
    • https://cdn.shopify.com/s/files/1/0437/3816/9498/files/binomial_theorem_tricks.pdf
    • https://cdn.shopify.com/s/files/1/0430/7622/3129/files/totanipimozix.pdf
    • https://cdn.shopify.com/s/files/1/0438/4666/4349/files/pewol.pdf
    • https://cdn.shopify.com/s/files/1/0428/3337/9487/files/15155250515.pdf
    • https://cdn.shopify.com/s/files/1/0427/8750/4294/files/kuvukidilizovaza.pdf
    • https://cdn.shopify.com/s/files/1/0450/1327/0692/files/44648752592.pdf
    • https://cdn.shopify.com/s/files/1/0429/7850/8953/files/75834467886.pdf
    • https://cdn.shopify.com/s/files/1/0432/9281/9616/files/lixalujebi.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/11783771814.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_off0000702a.bin
14c4cf390bcf1941218fa51d97de3956e70aff040c3f91f5c4552c6538178c61		 pdf-font-stream PDF embedded font (sfnt) at offset 0x702A 5392 bytes
font_01_sfnt_off0000825a.bin
c318cbd03118be115390fdbc0c01d8e89c951d3f390897921a760c7f25d4ec7c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x825A 10284 bytes

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