Malicious PDF — malware analysis report

Static analysis result for SHA-256 503f59813a123f55…

MALICIOUS

PDF

47.4 KB Created: 2020-07-23 21:14:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2966ae8d6bdd255ee5b8f327251ccc2b SHA-1: a444b4d242fb8c4022bfc759ce820fcec03e57fd SHA-256: 503f59813a123f551e4067257ea2588d57de6da9e6fdd506aff49ab54fed96a7
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many pointing to domains that host PDF files, suggesting a link farm or redirection scheme. One critical heuristic identified a link to known malicious redirector infrastructure. The document body, though heavily obfuscated, contains text related to a 'guide', which is likely a lure to encourage clicks on the malicious links. The ML classifier strongly flagged this PDF as malicious.

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=gw2+level+80+boost+guide
    • http://files.mpacf.shop/uploads/1/3/0/9/130969754/wefovedopad_sixunil.pdf
    • http://files.maggieleighmedia.com/uploads/1/3/1/4/131437983/batepimirudupe_xosifipo_rudejopaxow_livuzipawuki.pdf
    • http://files.nicoletorbay.com/uploads/1/3/0/9/130969896/e86c3e59c015f1.pdf
    • https://cdn.shopify.com/s/files/1/0429/6150/2362/files/59632679959.pdf
    • https://cdn.shopify.com/s/files/1/0431/4267/6648/files/pusejavoxiz.pdf
    • https://cdn.shopify.com/s/files/1/0436/9265/4745/files/xegufugevi.pdf
    • https://cdn.shopify.com/s/files/1/0430/3713/0914/files/50136652397.pdf
    • https://cdn.shopify.com/s/files/1/0432/5254/7739/files/91270746406.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/66179678401.pdf
    • https://cdn.shopify.com/s/files/1/0434/3293/5574/files/27235344887.pdf
    • https://cdn.shopify.com/s/files/1/0429/9423/7599/files/8981840828.pdf
    • https://cdn.shopify.com/s/files/1/0430/5482/5621/files/44217455810.pdf
    • https://cdn.shopify.com/s/files/1/0432/6411/4852/files/77085595116.pdf
    • https://cdn.shopify.com/s/files/1/0432/7083/2283/files/lomes.pdf
    • https://cdn.shopify.com/s/files/1/0437/2014/7112/files/9906887225.pdf
    • https://cdn.shopify.com/s/files/1/0433/5878/1590/files/sapirebijelozunegudiwudiz.pdf
    • https://cdn.shopify.com/s/files/1/0438/8116/9051/files/64076975781.pdf
    • http://tomcat.apache.org/download-80
    • 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_off00007a00.bin
bb08b2c760342d2fda89a80eba591b4f1d1650a3dd93f98978bd53d12180919e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7A00 5256 bytes
font_01_sfnt_off00008c07.bin
18a981588d5ac30d375445b7736a42c6fd2fdb92b1965abbf95ac69f365e7af7		 pdf-font-stream PDF embedded font (sfnt) at offset 0x8C07 10772 bytes

Open this report in the interactive analyzer, or submit your own file for analysis.