Malicious PDF — malware analysis report

Static analysis result for SHA-256 5b3e68db8f3aa074…

MALICIOUS

PDF

49.9 KB Created: 2020-09-02 22:36:21 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 6cd0eb862abe6e66a96fd40686253e89 SHA-1: 3e21da1baf3c17b53972da18043aa8fe56c96ea5 SHA-256: 5b3e68db8f3aa07478d51e7659b216065b43d86ea00f1c34e3fe29d33d5caa93
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a mass of external links, including one pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to a celebrity and media, suggesting a lure for phishing or a scam. The presence of numerous PDF links indicates a link farm, likely intended to drive traffic to malicious sites.

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.
  • Object number defined twice with different bodies info PDF_DUPLICATE_OBJ_BODY_INCREMENTAL
    The same indirect object (N G) is defined more than once with different body bytes. First-wins and last-wins readers will resolve different content, which is a parser-confusion shape used by targeted PDFs. Body-only differences are common in benign incremental updates, so severity is raised only when the duplicate carries active content.
  • 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=perfume+britney+spears+mp4
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/ee4a13_08aab44d54294dcb9bbec4c6d1fc84f3.pdf
    • https://static.usrfiles.com/ugd/eaf48f_d7e497143cb44012a4124dd6affa155f.pdf
    • https://static.usrfiles.com/ugd/0e9fc2_bbdca5e2074c4114b71b459c5855b98c.pdf
    • https://static.usrfiles.com/ugd/b8c837_b78f99b4222b4a828ab3645a0b5c9f49.pdf
    • https://static.usrfiles.com/ugd/e3325f_fcaa44533a9445a28e3d78dda292aa04.pdf
    • https://static.usrfiles.com/ugd/4dd980_5b5207858d824fe1a68f2a678ac9e4e2.pdf
    • https://static.usrfiles.com/ugd/162fe6_adf396ad009f4f4589900bf14abce8cd.pdf
    • https://static.usrfiles.com/ugd/911c12_1e9497233dba412fae7e0fc8bd78ca0a.pdf
    • https://static.usrfiles.com/ugd/b8c837_dbd9e75d778640b4b357b5f909b12d62.pdf
    • https://static.usrfiles.com/ugd/b8c837_545b203e077f4949b197755b78cd63af.pdf
    • https://static.usrfiles.com/ugd/e3ed1f_3302c10227d146be899fefdb2267d469.pdf
    • https://cdn.shopify.com/s/files/1/0433/1605/2126/files/free_jeopardy_game_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/2611/0885/files/59491931037.pdf
    • https://cdn.shopify.com/s/files/1/0447/3297/3205/files/sizajululonif.pdf
    • https://cdn.shopify.com/s/files/1/0431/2052/5476/files/bodusod.pdf
    • https://cdn.shopify.com/s/files/1/0432/4396/2532/files/vorefimikorutujezemu.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/
    • http://scripts.sil.org/OFL

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008367.bin
bccfb3853ab6787a634a6a1b00aa47f29e779380450f4f26baddb3d27611ef6b
pdf-font-stream PDF embedded font (sfnt) at offset 0x8367 5344 bytes
font_01_sfnt_off00009585.bin
a0f80169bc8498b081e53177e88d5ead133fd4ccb6bcefa8bc1610e7049a8c61
pdf-font-stream PDF embedded font (sfnt) at offset 0x9585 11312 bytes