Malicious PDF — malware analysis report

Static analysis result for SHA-256 fb2aa4147fe7f324…

MALICIOUS

PDF

40.0 KB Created: 2020-08-24 09:01:31 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e04e1274f3223620d2fe604b46df238d SHA-1: f06fb790609a3badf1b5165f3777856ed80d2e4c SHA-256: fb2aa4147fe7f324e15c186525f1293b9216fc3673c458dfd7525b385fac47c1
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a link to a known malicious redirector, ttraff.ru, which is part of a link farm designed to lure users with promises of hacked applications. The document body also contains this URL and other links to PDF files hosted on Shopify, likely to improve search engine ranking and visibility. The ML classifier strongly flagged this PDF as malicious, indicating a high likelihood of malicious intent.

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=animation+throwdown+hacked+apk
    • http://files.lgfb4her.ca/uploads/1/3/1/3/131380641/sazivivififo-tuwen-luzeju-xewirokuge.pdf
    • http://files.lacuevabearsgolf.com/uploads/1/3/0/7/130775607/2390068.pdf
    • http://files.mirelesice.com/uploads/1/3/0/7/130738562/aa771da4.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/8584587797.pdf
    • https://cdn.shopify.com/s/files/1/0434/3595/0236/files/39028299059.pdf
    • https://cdn.shopify.com/s/files/1/0431/9923/4203/files/57297414665.pdf
    • https://cdn.shopify.com/s/files/1/0431/0060/2525/files/bridges_of_madison_county_book_free.pdf
    • https://cdn.shopify.com/s/files/1/0434/7337/1288/files/successful_marriage_in_islam.pdf
    • https://cdn.shopify.com/s/files/1/0437/8597/8013/files/85949214229.pdf
    • https://cdn.shopify.com/s/files/1/0445/9646/1732/files/97801636860.pdf
    • https://cdn.shopify.com/s/files/1/0432/6277/1358/files/4036023329.pdf
    • https://cdn.shopify.com/s/files/1/0440/4042/1541/files/plex_raspberry_pi.pdf
    • https://cdn.shopify.com/s/files/1/0439/1262/6344/files/47095215814.pdf
    • https://cdn.shopify.com/s/files/1/0431/2668/5858/files/xabuzajegabatetewapawa.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00005e9a.bin
f68620219533d8912afc42e1e477fcff88f17ca0bea261af7b80791819ef0c12
pdf-font-stream PDF embedded font (sfnt) at offset 0x5E9A 5248 bytes
font_01_sfnt_off0000704c.bin
4504988d823ce870e5af2187c6c8ee66cb6135c241e8eab430991de1eae63a42
pdf-font-stream PDF embedded font (sfnt) at offset 0x704C 10320 bytes