Malicious PDF — malware analysis report

Static analysis result for SHA-256 70e864418dbcaf6c…

MALICIOUS

PDF

37.9 KB Created: 2020-08-30 08:41:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec4c3b5242c8f58d6462109a916a6ca8 SHA-1: 9d84bae7ed04f537b8672096105e9f815a0560bf SHA-256: 70e864418dbcaf6cf28c980cdb2c88d5bdcd808c4a13d5769a1afc49ab2a1612
154 Risk Score

Malware Insights

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

The PDF contains embedded links that redirect to a malicious URL, identified by the 'PDF_MALICIOUS_REDIRECTOR_LINK' heuristic. The document body, though heavily obfuscated, contains text related to 'nuka cola wallpaper' and the malicious URL, suggesting a lure. The presence of numerous external PDF links also indicates a link farm, a common tactic for SEO poisoning or distributing 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.com/wix?keyword=nuka+cola+wallpaper
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_31ab62e2ed9c4746bce29bbd0a9a6965.pdf
    • https://static.usrfiles.com/ugd/b8c837_7d7af03a04d145f7a49d1f0b9cdc5789.pdf
    • https://static.usrfiles.com/ugd/d5415a_77ead2e34b344634b8dbee88f715ee74.pdf
    • https://static.usrfiles.com/ugd/bf650e_7e5bdbd42fb34b048819b819d579a93d.pdf
    • https://static.usrfiles.com/ugd/45fd81_f10d085339dc46248216db29bc1842f6.pdf
    • https://static.usrfiles.com/ugd/e2c6c1_ff882156b7824987b08aee9de5fd0220.pdf
    • https://static.usrfiles.com/ugd/353d00_e8568d186b9047cfb79338616b12cab4.pdf
    • https://cdn.shopify.com/s/files/1/0429/4085/8527/files/7913553465.pdf
    • https://cdn.shopify.com/s/files/1/0431/5326/0706/files/kiwiforozati.pdf
    • https://cdn.shopify.com/s/files/1/0432/6300/0734/files/jimuzexemeveseberoru.pdf
    • https://static.usrfiles.com/ugd/0d089b_5a3dacf754294277b81d7b5de24307d4.pdf
    • https://static.usrfiles.com/ugd/c63dba_6e2494c68f1246f19adc8bdbcbde02c5.pdf
    • https://static.usrfiles.com/ugd/a107db_d797e13007a34d42843689ea77b204ad.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_off000056cf.bin
caa2e8630e0780592e54ac34cd9b5882c1f85fb116ae855f1a64da156639a8ba
pdf-font-stream PDF embedded font (sfnt) at offset 0x56CF 4872 bytes
font_01_sfnt_off00006781.bin
6d5d2454222dec14e915368f39ddcffead007bada3f7bc1adf556a253183a88e
pdf-font-stream PDF embedded font (sfnt) at offset 0x6781 10500 bytes