Malicious PDF — malware analysis report

Static analysis result for SHA-256 224bb7e03aa41bb5…

MALICIOUS

PDF

68.7 KB Created: 2020-08-29 22:33:47 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: c2da5f38dcc0e26a8fe88f55e20fa4b8 SHA-1: f145983f752042664bee044a14d1d3fb7a03c205 SHA-256: 224bb7e03aa41bb54fdc881e86b13f6137fbecede8eed9df07098c5349c7af81
158 Risk Score

Malware Insights

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

This PDF file contains embedded JavaScript and links to a known malicious redirector. The document body, though heavily obfuscated, appears to be a lure related to 'wordpress 4.7 pdf'. The primary malicious indicator is the link to 'https://ttraff.ru/wix?keyword=digging+into+wordpress+4.7+pdf', which is flagged as a malicious redirector. The presence of embedded JS and the ML classifier further support the malicious verdict.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 4

  • 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 JS stream low PDF_JS
    PDF references a /JS stream. Generic JavaScript is common in benign forms; specific dangerous APIs are scored by separate rules.
  • 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=digging+into+wordpress+4.7+pdf
    • https://static.usrfiles.com/ugd/67e251_6b78ef439346458494a7f69af057e876.pdf
    • https://static.usrfiles.com/ugd/b85eb0_91b641283ef840b7ad3f8a106710bc5c.pdf
    • https://static.usrfiles.com/ugd/b65acf_07d7899440224c0395abf737a9e475dc.pdf
    • https://static.usrfiles.com/ugd/c3548c_176f97a56f494cac8b7350e0e4607d65.pdf
    • https://static.usrfiles.com/ugd/b8c837_a069e590c199413ba56d35450666b219.pdf
    • https://static.usrfiles.com/ugd/b8c837_21d6ff3c49214fa6ac49425e5d180274.pdf
    • https://static.usrfiles.com/ugd/b8c837_d78006bb28264b5698053f9d80368bbf.pdf
    • https://cdn.shopify.com/s/files/1/0447/3644/6613/files/manuel_s_vintage_room_menu.pdf
    • https://cdn.shopify.com/s/files/1/0433/8876/4316/files/93220838224.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/birizakidunupujudexi.pdf
    • https://cdn.shopify.com/s/files/1/0437/9531/6893/files/kusinowumaruwodozip.pdf
    • https://cdn.shopify.com/s/files/1/0434/0586/9213/files/rerogatapilepumemi.pdf
    • https://cdn.shopify.com/s/files/1/0431/2137/7434/files/dragon_age_inquisition_ps4_nightmare_guide.pdf
    • https://cdn.shopify.com/s/files/1/0462/0097/9606/files/65960089882.pdf
    • https://cdn.shopify.com/s/files/1/0427/4244/8295/files/migodik.pdf
    • https://cdn.shopify.com/s/files/1/0431/3153/5524/files/66507184787.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 4

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off0000a46c.bin
8b5a882ac0b30c2207a7f66f90954ef33b699323625773cb6818d03340a38394		 pdf-font-stream PDF embedded font (sfnt) at offset 0xA46C 5588 bytes
font_01_sfnt_off0000b7fa.bin
9ca1c3a1f98b99f151c10bfe3781954003ffc28536cad8bc4dd9280bae2f68ce		 pdf-font-stream PDF embedded font (sfnt) at offset 0xB7FA 5260 bytes
font_02_sfnt_off0000ca19.bin
7073f777ec002e82a856420936458262fa3cc3b4ee0437ed56f01fa51c4379d2		 pdf-font-stream PDF embedded font (sfnt) at offset 0xCA19 4140 bytes
font_03_sfnt_off0000d741.bin
3e13ba755aab45f174332a186e611b28608a2dea746283e6e013916aeab197bb		 pdf-font-stream PDF embedded font (sfnt) at offset 0xD741 13620 bytes

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