Malicious PDF — malware analysis report

Static analysis result for SHA-256 77e1e7f2d22d66bd…

MALICIOUS

PDF

100.2 KB Created: 2020-08-17 16:32:20 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 05dff461c63e595daf5f0de334913c9b SHA-1: 8c90cdccf7834b1499b492cf4ce6ab054c311c40 SHA-256: 77e1e7f2d22d66bd38f91c914f8a068bb94390e48b279625096fb4e8d11aab4c
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.com'. This indicates the document is designed to redirect users to potentially harmful websites. The presence of a large number of external PDF links, many hosted on shopify.com, suggests a link farm or SEO poisoning tactic to obscure the final malicious destination. The ML classifier also strongly flagged this PDF as malicious.

Machine Learning

  • Nyx PDF Classifier malicious score 0.9977

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.com/pify?keyword=bootstrap++icon+css
    • http://files.jbaumgartel.com/uploads/1/3/0/7/130739095/tumuzuriju_dosimudevutezim_gixosofebasizu_saxemotetutu.pdf
    • http://piwopiwu.jmintegratedmarketing.com/uploads/1/3/0/7/130775982/makiwojedepukinerase.pdf
    • http://files.theksbphoto.com/uploads/1/3/0/8/130873820/2357027.pdf
    • http://mimog.maudink.com/uploads/1/3/0/7/130776716/bokuvasetuluj.pdf
    • https://cdn.shopify.com/s/files/1/0436/1653/4690/files/nekobasi.pdf
    • https://cdn.shopify.com/s/files/1/0428/8790/5446/files/42948420749.pdf
    • https://cdn.shopify.com/s/files/1/0431/0741/8274/files/alcatraz_tv_series.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/46676539889.pdf
    • https://cdn.shopify.com/s/files/1/0433/3476/2664/files/pusixebi.pdf
    • https://cdn.shopify.com/s/files/1/0431/4490/4855/files/tivivuzuzubinerajiruga.pdf
    • https://cdn.shopify.com/s/files/1/0434/6917/6985/files/71619107247.pdf
    • https://cdn.shopify.com/s/files/1/0438/8657/5771/files/ayub_khan_era_1958_to_1969.pdf
    • https://cdn.shopify.com/s/files/1/0429/5753/7439/files/solidworks_composer_free_trial.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 9

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000066f1.bin
960be24e41903e2c9ee1a53646adac9b94dd6a5b6743d5e0f11d54c2ff8ab323		 pdf-font-stream PDF embedded font (sfnt) at offset 0x66F1 6740 bytes
font_01_sfnt_off0000778d.bin
d841e6ee9fc5f8d88f1d94419f2a0f587508a927e8deb92e2b18ca34c352e48a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x778D 6168 bytes
font_02_sfnt_off0000872c.bin
ac054462a23a8809c424800efd3beacf075d178a28af52b6d59451c7a3b55e6a		 pdf-font-stream PDF embedded font (sfnt) at offset 0x872C 4944 bytes
font_03_sfnt_off0000980a.bin
3300f268e4e1f6e441dc9073c8b0066863dc1ba56e5e9ce4a96ad78ad18c716b		 pdf-font-stream PDF embedded font (sfnt) at offset 0x980A 26912 bytes
font_04_sfnt_off0000c6f8.bin
fb95e105fb8951c1117ae08d079046f5b057876905c4871dbd4e528cc8f47315		 pdf-font-stream PDF embedded font (sfnt) at offset 0xC6F8 23064 bytes
font_05_sfnt_off00011147.bin
64dc8fc5d82f8124bee96b54d9c2409d08ec346abe0875115db0a4d81423d47c		 pdf-font-stream PDF embedded font (sfnt) at offset 0x11147 1624 bytes
font_06_sfnt_off0001198d.bin
1cf980009f2141720f304e97f705f72558e8c53e9d04f42702ce42b4e8ac00f1		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1198D 13276 bytes
font_07_sfnt_off0001440f.bin
f0b0ae2d13a5b3977d7445bd418d3dfd11dc3b7f5d41768ee5f5188793f4be58		 pdf-font-stream PDF embedded font (sfnt) at offset 0x1440F 16744 bytes
font_08_sfnt_off00015b80.bin
cff2445a5d90bc150e3cdb2c80b0fee15cd0f1ce5e06ac676d0b57eb45bef125		 pdf-font-stream PDF embedded font (sfnt) at offset 0x15B80 15608 bytes

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