Malicious PDF — malware analysis report

Static analysis result for SHA-256 b24a94ecbc0b251a…

MALICIOUS

PDF

55.2 KB Created: 2020-08-01 05:16:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2ac13374016a25e524b2964b8adc229f SHA-1: 302efde6f52f5fb4e771282d8c268cdc83479dd0 SHA-256: b24a94ecbc0b251a107665a755968a99650631f4508b5b594912f14efce8c7de
154 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to ttraff.cc. Additionally, it exhibits characteristics of a PDF link farm, with numerous embedded URLs, many hosted on cdn.shopify.com. The document body, though heavily obfuscated, contains the same malicious URL. The primary intent appears to be luring the user to a malicious site via the embedded link.

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=dragon%2527+s+dogma+cursed+carving
    • http://files.takeabreakfromtheinterstate.org/uploads/1/3/2/3/132303353/rafudiwuxokelod.pdf
    • http://files.dragonflyguitarcoaching.com/uploads/1/3/1/4/131438282/5244d1e6fc2.pdf
    • http://files.marthaannepalmer.com/uploads/1/3/2/6/132695492/sekitowig_wulokof_fekemunej.pdf
    • http://files.thepropertyamazon.com/uploads/1/3/1/3/131380308/furukapatumox.pdf
    • https://cdn.shopify.com/s/files/1/0430/8808/5143/files/4922780202.pdf
    • https://cdn.shopify.com/s/files/1/0433/4089/0265/files/nawobawapajofa.pdf
    • https://cdn.shopify.com/s/files/1/0430/9896/4117/files/kumofej.pdf
    • https://cdn.shopify.com/s/files/1/0432/8760/9497/files/90455388633.pdf
    • https://cdn.shopify.com/s/files/1/0432/3459/0878/files/jafekuwujutomidokawu.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/97625471818.pdf
    • https://cdn.shopify.com/s/files/1/0429/7952/4759/files/62877756456.pdf
    • https://cdn.shopify.com/s/files/1/0430/8929/7568/files/xotepulixemukenaw.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/pegumi.pdf
    • https://cdn.shopify.com/s/files/1/0428/2312/3100/files/84070763002.pdf
    • https://cdn.shopify.com/s/files/1/0434/0505/0021/files/92020264015.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_off00009b97.bin
dbbf47fe9d3b073e8010a8df9b39239a0077178462842d9a49f643c556d080c0
pdf-font-stream PDF embedded font (sfnt) at offset 0x9B97 5320 bytes
font_01_sfnt_off0000adac.bin
a46f2bbab0d23dc626c1e87a9b574894abbf273a89a076905b4319f5eee3bf58
pdf-font-stream PDF embedded font (sfnt) at offset 0xADAC 10016 bytes