Malicious PDF — malware analysis report

Static analysis result for SHA-256 990cc4120f218dfe…

MALICIOUS

PDF

47.4 KB Created: 2020-08-29 18:45:08 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: a411cda17db7b5f0e499b216fbd448f6 SHA-1: a61eeec06324b0160fa12891922f9547479b3b49 SHA-256: 990cc4120f218dfe19d891551dd3fbbe3799cb59df03c9964eb4baf21ac0e4ef
150 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a redirector service. The primary heuristic indicates that the PDF links to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains a URL that appears to be the initial lure. The presence of numerous external links suggests a link farm or redirection strategy to distribute malicious content.

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.com/wix?keyword=monster+hunter+stories+subquest+guid
    • https://static.usrfiles.com/ugd/b8c837_f52deb9be8244e29984e75f8eda850cf.pdf
    • https://static.usrfiles.com/ugd/b8c837_2c1c2a3713ab43eab5e5e0d28b856f2c.pdf
    • https://static.usrfiles.com/ugd/8b2c09_7be04254913d49cba59ce3e12df0e9d6.pdf
    • https://static.usrfiles.com/ugd/b8c837_dff7c2f01dfb49fc867614780af3b1a9.pdf
    • https://cdn.shopify.com/s/files/1/0433/5727/4270/files/15881797433.pdf
    • https://cdn.shopify.com/s/files/1/0434/4145/5270/files/legime.pdf
    • https://cdn.shopify.com/s/files/1/0431/8353/8331/files/just_dance_2012_song_list.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/7868051279.pdf
    • https://cdn.shopify.com/s/files/1/0433/1575/7214/files/laganilabupogeza.pdf
    • https://static.usrfiles.com/ugd/7baf93_a96dc99a01f840b39db4dc0e469d3236.pdf
    • https://static.usrfiles.com/ugd/38bf1f_540eac73a3c04a46903871f4c6375f13.pdf
    • https://static.usrfiles.com/ugd/b8c837_4bc0c6f527d74564a636a529e350350f.pdf
    • https://static.usrfiles.com/ugd/b8c837_625fc9eed6064170b7865bbc90d4bb3c.pdf
    • https://static.usrfiles.com/ugd/b8c837_9522a37077854400a4d90deb1b986093.pdf
    • https://cdn.shopify.com/s/files/1/0433/2866/7816/files/download_sex_games_for_android_witho.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/woburorofinuxup.pdf
    • https://cdn.shopify.com/s/files/1/0429/1336/6182/files/17367791070.pdf
    • https://cdn.shopify.com/s/files/1/0431/6797/3538/files/musujekunane.pdf
    • https://cdn.shopify.com/s/files/1/0432/0893/3540/files/23672122744.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_off00006dba.bin
50ef7d88eec357f2fb397680d209833d557a69ef353d5bcb83ae9f7d2f72b253
pdf-font-stream PDF embedded font (sfnt) at offset 0x6DBA 5000 bytes
font_01_sfnt_off00007ea2.bin
8b08f458da256f56f779ab17712ee4bbc5f5ca9cd1255bf8a9826c57a168e1ca
pdf-font-stream PDF embedded font (sfnt) at offset 0x7EA2 10260 bytes
font_02_sfnt_off0000a18e.bin
cd94ef65598b1866d0653cdd88243d989fd81359c0e770c2d3a4858f1c2f6d34
pdf-font-stream PDF embedded font (sfnt) at offset 0xA18E 4324 bytes