Malicious PDF — malware analysis report

Static analysis result for SHA-256 ea8bb9f63c1d9a3b…

MALICIOUS

PDF

36.6 KB Created: 2020-08-31 14:20:58 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fb9c56f9f022aacfc1cbd52c3a302d9e SHA-1: ddf64f1b2a210bf28441653b07891fa4ce668f6a SHA-256: ea8bb9f63c1d9a3b5cbbc515b372377be31da99449f4e1097331fe230ab6b446
152 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to a link farm hosted on static.usrfiles.com. One of the primary links, https://ttraff.cc/pify?keyword=pringles+mystery+flavour+nz+answer, is identified as a malicious redirector. This suggests the document is designed to lead users to malicious websites through a series of redirects, likely for phishing or malware distribution.

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=pringles+mystery+flavour+nz+answer
    • https://static.usrfiles.com/ugd/fa6f14_21f42402357241a4aacc7132a645528f.pdf
    • https://static.usrfiles.com/ugd/225520_83159c680c1148589662e1630062dc08.pdf
    • https://static.usrfiles.com/ugd/7e6083_741ce4a4eb854aa58b13ee618cd32dca.pdf
    • https://static.usrfiles.com/ugd/f967ac_f1fda8bddb8b4609bfb0f7f3791b2b8b.pdf
    • https://static.usrfiles.com/ugd/b8c837_71baf34b07de4a609da323efc26e6da5.pdf
    • https://cdn.shopify.com/s/files/1/0432/0310/0832/files/she_talks_to_angels_tab_open_d.pdf
    • https://cdn.shopify.com/s/files/1/0436/9219/5993/files/lakonizesojuvuf.pdf
    • https://cdn.shopify.com/s/files/1/0437/2827/3562/files/30501815247.pdf
    • https://cdn.shopify.com/s/files/1/0437/1700/1368/files/abzurdah_libro_gratis.pdf
    • https://cdn.shopify.com/s/files/1/0432/4550/2626/files/ponubobemodudapetivukopo.pdf
    • https://static.usrfiles.com/ugd/e73fea_74ddc58884e442c5a87ebfaed609ecf5.pdf
    • https://static.usrfiles.com/ugd/fd3290_427a5ba0cd574093acbce811fc3456cc.pdf
    • https://static.usrfiles.com/ugd/b8c837_28ee1430f79b46dc984a160ba83336f8.pdf
    • https://static.usrfiles.com/ugd/d78803_19b51314551440a2b7beedc626f8425e.pdf
    • https://static.usrfiles.com/ugd/7598fa_02521d84b13f4ad89fdc0e4edf365141.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_off00004f4f.bin
7e6c208a0c8f63afddca65df6b91818b058f3dfebc2fd156dede68d129b18269
pdf-font-stream PDF embedded font (sfnt) at offset 0x4F4F 5392 bytes
font_01_sfnt_off000061b7.bin
652c3888285eaf3e853a6fb0a2dd6a6b92ae65457ccba7f70ff01a3a28fff9da
pdf-font-stream PDF embedded font (sfnt) at offset 0x61B7 10312 bytes