Malicious PDF — malware analysis report

Static analysis result for SHA-256 53d2e01ea4ef0c57…

MALICIOUS

PDF

93.2 KB Created: 2020-09-01 06:43:45 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 29989a79b6dd8753c9dc9fecb8b39059 SHA-1: 26c1db4b01b329776da9d14126b4a070be0079dd SHA-256: 53d2e01ea4ef0c571f692353afe9b7315a87e33fbc64120ad7ac899119694241
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, ttraff.com, which is disguised as a news report. The ML classifier strongly indicates maliciousness. The document body contains obfuscated text and the malicious URL, suggesting a phishing or redirection attempt to a malicious site.

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.com/pify?keyword=7news+adelaide+weather+report
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemulubu.pdf
    • https://cdn.shopify.com/s/files/1/0438/6373/6485/files/dante_s_inferno_john_ciardi.pdf
    • https://cdn.shopify.com/s/files/1/0438/2221/9421/files/51024825431.pdf
    • https://cdn.shopify.com/s/files/1/0431/9641/6160/files/jujolixedemexatilutetar.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/lowitopeb.pdf
    • https://cdn.shopify.com/s/files/1/0431/4434/7799/files/sajijaw.pdf
    • https://cdn.shopify.com/s/files/1/0429/8942/0695/files/58677294731.pdf
    • https://cdn.shopify.com/s/files/1/0430/1111/3123/files/brother_xl2600i_manual.pdf
    • https://static.usrfiles.com/ugd/b8c837_29124ebfb1394f6890e91d97662791a0.pdf
    • https://static.usrfiles.com/ugd/6d59ab_d374475b86df4a30843ce54c3aa6ca15.pdf
    • https://static.usrfiles.com/ugd/20d83a_36c26551cafc446eaa2d7f38ba5c2c70.pdf
    • https://cdn.shopify.com/s/files/1/0432/3803/1518/files/sexuality_and_psychology_of_love.pdf
    • https://cdn.shopify.com/s/files/1/0434/3057/6285/files/98363111846.pdf
    • https://cdn.shopify.com/s/files/1/0439/0689/1931/files/wifawajur.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/1/0428/9835

Extracted artifacts 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00012f76.bin
6a101137c5acc70fa8ac358fae51e883fd88ea07a99bc1b3aa3a7fed5abb418d
pdf-font-stream PDF embedded font (sfnt) at offset 0x12F76 5124 bytes
font_01_sfnt_off000140f2.bin
d894ab9cc940d3c83f6bc1be31037d5d95b9a91a6a70c39006ab0d6c35e7d77f
pdf-font-stream PDF embedded font (sfnt) at offset 0x140F2 11628 bytes