Malicious PDF — malware analysis report

Static analysis result for SHA-256 05b68dab7109161f…

MALICIOUS

PDF

38.8 KB Created: 2020-08-19 04:29:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b87f836073e99b50dff9e6aba0725e08 SHA-1: 346d9c2a61a6483b3c014e6763c3a77ac55d32fe SHA-256: 05b68dab7109161f86ab4b140e355390436aeba087592271ab91a4db15824d4c
154 Risk Score

Malware Insights

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

The PDF contains a link that redirects to malicious infrastructure, identified by the PDF_MALICIOUS_REDIRECTOR_LINK heuristic. The document body, though heavily obfuscated, contains the URL https://ttraff.ru/pify?keyword=chevrolet+impala+2017+manual, suggesting a lure for users seeking a manual. The PDF also contains a large number of links to Shopify-hosted PDFs, indicating a potential link farm or SEO manipulation tactic.

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.ru/pify?keyword=chevrolet+impala+2017+manual
    • http://files.bhelandscaping.com/uploads/1/3/1/4/131452991/balewixawomavuloz.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/7157/8024/files/sutezeluzod.pdf
    • https://cdn.shopify.com/s/files/1/0429/9676/0730/files/neonatal_jaundice_management.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/gomejalubewetilukifij.pdf
    • https://cdn.shopify.com/s/files/1/0428/7594/5113/files/zakiseweb.pdf
    • https://cdn.shopify.com/s/files/1/0429/9030/5443/files/21548162133.pdf
    • https://cdn.shopify.com/s/files/1/0431/3926/8769/files/43054954312.pdf
    • https://cdn.shopify.com/s/files/1/0440/5297/1685/files/icse_class_10_biology_book_free_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/8407/9523/files/28254170598.pdf
    • https://cdn.shopify.com/s/files/1/0430/2897/1681/files/56922525451.pdf
    • https://cdn.shopify.com/s/files/1/0435/5496/3617/files/malokosowudi.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_off00005aa1.bin
4c2d63374d2b80ed8507a60b71dcfbdfb64131cb842d2f76972890e5909e9b5f
pdf-font-stream PDF embedded font (sfnt) at offset 0x5AA1 5252 bytes
font_01_sfnt_off00006c66.bin
16ee2a3b04e8d0b999872d5522ece9ee68aefbf51c4f4f865ecefe9d3bfe425d
pdf-font-stream PDF embedded font (sfnt) at offset 0x6C66 10068 bytes