Malicious PDF — malware analysis report

Static analysis result for SHA-256 9216635b63504d56…

MALICIOUS

PDF

44.8 KB Created: 2020-09-19 07:40:02 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 27324691f5ff33bc355c4cf9a6134a12 SHA-1: ad87175671a53ad3c0d7d5e3a7d659226ad287b0 SHA-256: 9216635b63504d56f42bbae84c73e4ee7708e4cadc69e664d8c1617bc9f45f0f
154 Risk Score

Malware Insights

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

The PDF contains multiple embedded links, with one specifically identified as a malicious redirector. The document body, though partially corrupted, contains text related to downloading game cheats, which aligns with the malicious URL's query parameters. The ML classifier also strongly indicated maliciousness.

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.me/wix?keyword=download+game+dead+target+cheat+mod+apk
    • https://1331f9e4-820d-4a20-8a3f-57214d590cd4.filesusr.com/ugd/64db51_4b663398919f4d92babc97a9b4884a8c.pdf?index=true
    • https://b1c7e286-dca5-411c-b2d5-a9feb6f0ac77.filesusr.com/ugd/9ea91e_2ca1dcb47f9f4408a26b7470baa0f90d.pdf?index=true
    • https://c17a4701-b5f1-4683-9344-d6ebb2264609.filesusr.com/ugd/8ac1ab_4915efa0529d414fae594a2045903ecb.pdf?index=true
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/zorugeligix.pdf
    • https://cdn.shopify.com/s/files/1/0428/7466/7164/files/90676671352.pdf
    • https://cdn.shopify.com/s/files/1/0435/9212/2527/files/9879324161.pdf
    • https://cdn.shopify.com/s/files/1/0439/9782/3134/files/nih_reporter_login.pdf
    • https://cdn.shopify.com/s/files/1/0433/9751/3381/files/4256682310.pdf
    • https://cdn.shopify.com/s/files/1/0429/6006/0567/files/gadur.pdf
    • https://cdn.shopify.com/s/files/1/0433/1339/7924/files/warhammer_40_000_fire_warrior.pdf
    • https://cdn.shopify.com/s/files/1/0433/0805/6740/files/30262139829.pdf
    • https://cdn.shopify.com/s/files/1/0427/7898/4614/files/dijanajolevunu.pdf
    • https://cdn.shopify.com/s/files/1/0460/1747/8815/files/antagonistas_canales_de_calcio.pdf
    • https://cdn.shopify.com/s/files/1/0427/6640/1692/files/jisujusigajita.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_off00006fb1.bin
c82327b4949aee78fbb4b194f21da69dc603f39917f764d2e401f39286c5d630
pdf-font-stream PDF embedded font (sfnt) at offset 0x6FB1 5464 bytes
font_01_sfnt_off00008234.bin
a1c924bb0ae2611a6ff52367f4ec4020a108ae1a99f7945472f21f0e5627dbc5
pdf-font-stream PDF embedded font (sfnt) at offset 0x8234 10388 bytes