Malicious PDF — malware analysis report

Static analysis result for SHA-256 29df7700715bced7…

MALICIOUS

PDF

41.9 KB Created: 2020-08-03 12:45:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 1c45f3a3936ef2393fe99b6455fb956b SHA-1: b9704229f0ab459cfe8e1509f080dc9d8a435561 SHA-256: 29df7700715bced7bc38dd969df63a67a023293dea4bedc1d51c07be00841cc9
152 Risk Score

Malware Insights

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

The PDF contains numerous embedded links, with a critical heuristic firing for a malicious redirector. The document body, though heavily obfuscated, contains a URL that mirrors the malicious redirector. The primary purpose appears to be directing users to malicious infrastructure through a link farm, potentially for SEO manipulation or to serve further malicious content.

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.cc/pify?keyword=backdoor+roth+ira+vanguard+pdf
    • http://files.createleadersnow.com/uploads/1/3/0/7/130740249/2181253.pdf
    • http://files.desertpoppynaturals.com/uploads/1/3/1/3/131379496/zuxekosedibu.pdf
    • http://pezajes.compubc.com/uploads/1/3/1/4/131454106/8084203.pdf
    • http://files.banksfamily2017.com/uploads/1/3/2/7/132712129/4892911.pdf
    • https://cdn.shopify.com/s/files/1/0435/5158/8507/files/vafibomobedig.pdf
    • https://cdn.shopify.com/s/files/1/0435/3336/9503/files/11556224549.pdf
    • https://cdn.shopify.com/s/files/1/0438/1864/7709/files/26660718659.pdf
    • https://cdn.shopify.com/s/files/1/0440/8596/9048/files/14669833492.pdf
    • https://cdn.shopify.com/s/files/1/0437/2476/7400/files/media_convergence_examples.pdf
    • https://cdn.shopify.com/s/files/1/0434/9113/1557/files/6558643806.pdf
    • https://cdn.shopify.com/s/files/1/0430/4951/7205/files/25087579364.pdf
    • https://cdn.shopify.com/s/files/1/0427/5719/3895/files/79820397470.pdf
    • https://cdn.shopify.com/s/files/1/0432/2046/7869/files/fiwepisikopapumapowuv.pdf
    • https://cdn.shopify.com/s/files/1/0428/2915/2423/files/kaxoridisufulisonubatet.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/55864873889.pdf
    • https://cdn.shopify.com/s/files/1/0431/4975/4519/files/wuxowa.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_off000065e6.bin
f622427b4a4601d76f7b36a8e75b1ba088e7daf1c04aa588ec9e05a5955063c9
pdf-font-stream PDF embedded font (sfnt) at offset 0x65E6 5380 bytes
font_01_sfnt_off00007841.bin
fabd299c8abf0c39d349065a11bdc0408a7474566e33b71c63377d1102d334f1
pdf-font-stream PDF embedded font (sfnt) at offset 0x7841 10184 bytes