Malicious PDF — malware analysis report

Static analysis result for SHA-256 24c6e41cdff624ab…

MALICIOUS

PDF

40.8 KB Created: 2020-08-29 06:23:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bdfc8d5b49fd8414d91199eba91c9494 SHA-1: 65655bf086df303e1e58332bf359d29e9882719b SHA-256: 24c6e41cdff624ab479445fff19c0ea635217c3bb29c326df86c27f68ac4b1fe
150 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.ru, which is disguised as a file conversion tool. The document body and embedded links suggest a lure to trick users into clicking the malicious URL. The ML classifier also strongly indicated maliciousness.

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/wix?keyword=jak+przerobic+z+pdf+na+worda
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/soreluseloxajakikolo.pdf
    • https://cdn.shopify.com/s/files/1/0428/1883/0492/files/all_caste_list_in_india.pdf
    • https://cdn.shopify.com/s/files/1/0432/5729/9097/files/secret_love_giovanni_allevi_sheet_music.pdf
    • https://static.usrfiles.com/ugd/b8c837_3d30c6264ead4e4284f3369f2d1113d0.pdf
    • https://static.usrfiles.com/ugd/b8c837_46e0c58e1bab46e691f51630ab7c73a6.pdf
    • https://static.usrfiles.com/ugd/b8c837_3bc711463b5543f9bfda39dff8fea57d.pdf
    • https://static.usrfiles.com/ugd/b8c837_c70d88f7119f4663adb1b4f88511552c.pdf
    • https://static.usrfiles.com/ugd/b8c837_40f16f11a69a442181997954451dbc2f.pdf
    • https://static.usrfiles.com/ugd/b8c837_3503e436e03d486db9ff2ef8d9ebfd65.pdf
    • https://cdn.shopify.com/s/files/1/0431/9277/8912/files/pudokoj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8078/5821/files/german_learning_books_a1.pdf
    • https://cdn.shopify.com/s/files/1/0437/8879/6065/files/41050364664.pdf
    • https://cdn.shopify.com/s/files/1/0433/0645/1094/files/moral_issues_in_patenting_biotechnological_inventions.pdf
    • https://cdn.shopify.com/s/files/1/0440/2728/1558/files/canales_de_comercializacion.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004c2b.bin
50bf583ce3ec228f17e1130fec7e36b3ba950e19aea97df8c1bc9f2a7bbd3eec		 pdf-font-stream PDF embedded font (sfnt) at offset 0x4C2B 5276 bytes
font_01_sfnt_off00005e36.bin
7e8f4e43c80f2c698d88a67a420558d94dda59c362cd5373b36263affb2258bc		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E36 7184 bytes
font_02_sfnt_off000071b3.bin
5140b4546d1d631169aed7d1f69dbf69b349f5edffe9266f4f51d2c3525cc717		 pdf-font-stream PDF embedded font (sfnt) at offset 0x71B3 10932 bytes

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