Malicious PDF — malware analysis report

Static analysis result for SHA-256 4aa6dc198a4d530b…

MALICIOUS

PDF

49.4 KB Created: 2020-09-07 09:37:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7ea8755e01bcbd161a22149dd5dda73e SHA-1: d4f9f35396fe284e936f9e07ea59f655ab9f7e20 SHA-256: 4aa6dc198a4d530b323c23adc057795c33071a5b0492866bba8db776657aa495
120 Risk Score

Malware Insights

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

The PDF file contains numerous links designed to create a link farm, with one critical link pointing to a known malicious redirector. The document body, though heavily obfuscated, contains the URL 'https://ttraff.me/wix?keyword=logarithms+exercises+and+answers+pdf', which is flagged as malicious. This suggests the document's primary purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing. The presence of many benign Shopify links is likely a tactic to mask the malicious redirector.

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=logarithms+exercises+and+answers+pdf
    • https://cdn.shopify.com/s/files/1/0431/5332/6241/files/export_to_excel_spreadsheet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/44411244229.pdf
    • https://cdn.shopify.com/s/files/1/0437/0441/8459/files/artemis_fowl_the_last_guardian_weebly.pdf
    • https://cdn.shopify.com/s/files/1/0427/6345/2583/files/10358456385.pdf
    • https://static.usrfiles.com/ugd/b8c837_9010707b508d4fe29e5c843adfd177c3.pdf
    • https://static.usrfiles.com/ugd/3d7af5_a60526ed89eb48d3aca0f31b2be1316b.pdf
    • https://static.usrfiles.com/ugd/e6092c_4526bb7a1f064673a47002f700abf17d.pdf
    • https://static.usrfiles.com/ugd/a421e3_042498167b554e96843dbf8d650c7ed6.pdf
    • https://static.usrfiles.com/ugd/6a7407_607beb2df3174293887003a9b3a7755a.pdf
    • https://static.usrfiles.com/ugd/957c7b_d22f2367f2aa4c438189b4efcc6bea55.pdf
    • https://static.usrfiles.com/ugd/97aff7_c75d7134a67d45f3add26ca55c5742a1.pdf
    • https://static.usrfiles.com/ugd/ddb60a_38deb964be1a49aaa5da5fa57ef689ab.pdf
    • https://static.usrfiles.com/ugd/b16523_7c1bf7c0599c4cb4b5502fe26156d86f.pdf
    • https://cdn.shopify.com/s/files/1/0433/7169/2188/files/aged_bell_gungeon.pdf
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/81632340160.pdf
    • https://cdn.shopify.com/s/files/1/0432/4029/2520/files/fefivegirikix.pdf
    • https://cdn.shopify.com/s/files/1/0434/7294/5304/files/blended_vowel_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0433/5347/3189/files/wipidatatikinimizopapew.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/
    • https://cdn.shopify.com/s/files/1/0431/5879/8492/files/81632340160.p

Extracted artifacts 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000064c0.bin
0c0f396c37c40b72268d12f26343ff8de9d1ca992bc89a8b40b1445020b372d8
pdf-font-stream PDF embedded font (sfnt) at offset 0x64C0 5640 bytes
font_01_sfnt_off000077e5.bin
f285ab16156101b5e748186c303c1da33278885138bbcc9c90869b05c2e01372
pdf-font-stream PDF embedded font (sfnt) at offset 0x77E5 13588 bytes
font_02_sfnt_off0000a2a2.bin
d44d52ef66720e7299aa23375668eb807971917d9a72a2eac4a2c392e38f6666
pdf-font-stream PDF embedded font (sfnt) at offset 0xA2A2 16128 bytes