Malicious PDF — malware analysis report

Static analysis result for SHA-256 8cce22bf98d55099…

MALICIOUS

PDF

69.8 KB Created: 2020-08-30 08:39:57 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f15f38bb669d9220a4ccfc661a7bb938 SHA-1: 6563c3fa047f6027bdb5aa70abefafd40db50aed SHA-256: 8cce22bf98d550997eae1b1568ac36f95c15a25fc8300015bd7add382651195a
152 Risk Score

Malware Insights

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

The PDF file was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link to known malicious infrastructure. It also exhibits characteristics of a PDF link farm, with numerous embedded URLs pointing to external resources. The primary malicious IOC is the redirector URL, which is likely used to funnel victims to a phishing or malware delivery site.

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.link/wix?keyword=pathfinder+half+orc+classes
    • https://static.usrfiles.com/ugd/b8c837_3beccebde3b047ee88b3fe86091f6146.pdf
    • https://static.usrfiles.com/ugd/b8c837_9697dd7740e74475badebf05d2c73e82.pdf
    • https://static.usrfiles.com/ugd/b8c837_fe9df4e1fb954b29902d38cc3d2145f9.pdf
    • https://static.usrfiles.com/ugd/f523c3_f9e97a9f3d914f09ad65d6e4c5a6372b.pdf
    • https://static.usrfiles.com/ugd/b8c837_da2133d936164a218f79a8d2f4a3d882.pdf
    • https://static.usrfiles.com/ugd/576447_daec1889b394416b8ec56ee9a94418d9.pdf
    • https://static.usrfiles.com/ugd/b8c837_c8fc5307b7c84764b06b437b970d8ec4.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b6a671e68074d0092aa7839ba5754c4.pdf
    • https://static.usrfiles.com/ugd/97634b_f22c62d9b3a047f1b63f799a945a74b2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ddcf71396a3c463a99180d85e72960ff.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/rinubigelezegir.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/81263825614.pdf
    • https://cdn.shopify.com/s/files/1/0455/4008/1829/files/72244260258.pdf
    • https://cdn.shopify.com/s/files/1/0427/9812/1119/files/94244069490.pdf
    • https://cdn.shopify.com/s/files/1/0431/3110/9540/files/kodozajaletabikifedodij.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_off0000d728.bin
1687f774bcb091f61b44fb33584033b22e62e5d2e35e1dd527d899647646ffbe
pdf-font-stream PDF embedded font (sfnt) at offset 0xD728 5112 bytes
font_01_sfnt_off0000e874.bin
e01fe406e9fef6f3b4311705ed886ddc6d68222c0b509d64134d419d18120909
pdf-font-stream PDF embedded font (sfnt) at offset 0xE874 9900 bytes