Malicious PDF — malware analysis report

Static analysis result for SHA-256 6277b67923610bb4…

MALICIOUS

PDF

55.8 KB Created: 2020-08-31 03:02:43 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 9373f36edc9ba29ce01665db547597dc SHA-1: f1c0955ba444d589a562229cd55ddff1f5e0bfae SHA-256: 6277b67923610bb40ae84ebd4599f182a05496d8441c8f50154db0fae2bcb581
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to external PDF documents, a technique often used for SEO manipulation or to obscure malicious destinations. One of the primary embedded URLs, 'https://ttraff.me/wix?keyword=shieldbreaker+darkest+dungeon+comic', is flagged as a malicious redirector. This suggests the document's purpose is to redirect users to malicious infrastructure, likely for further exploitation or phishing.

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=shieldbreaker+darkest+dungeon+comic
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_74465752283444388758f57b94ea23c3.pdf
    • https://static.usrfiles.com/ugd/b8c837_f8437bfbc26b424c91f8d9ba040621c6.pdf
    • https://static.usrfiles.com/ugd/b8c837_2194ea78d2544d08ad7d57aa5fd3d928.pdf
    • https://static.usrfiles.com/ugd/b8c837_7c7dd89e9dab43968eb089672b0031c8.pdf
    • https://static.usrfiles.com/ugd/3cb679_925f457b5e86430ab0b83cb9e4abba67.pdf
    • https://static.usrfiles.com/ugd/ab922d_5fc92992346e45b3aae2402a5582bbcb.pdf
    • https://static.usrfiles.com/ugd/b8c837_ad3664f75d21438c9aca8596a88ec93b.pdf
    • https://static.usrfiles.com/ugd/91e123_1d24dcd292264e2ab399a752a051e15c.pdf
    • https://static.usrfiles.com/ugd/b8c837_83b5581846904130aa0d4c35885f5f10.pdf
    • https://static.usrfiles.com/ugd/ce14f3_e553f29978de4ff38a9ac35bef025b99.pdf
    • https://static.usrfiles.com/ugd/b972d5_44c6fdc7f78b495ca584e46eb24034d3.pdf
    • https://static.usrfiles.com/ugd/2813e2_cf4ade5b095f4aa781d2f4d3e371e8b1.pdf
    • https://static.usrfiles.com/ugd/cf14a4_e78684a873a94e26bd2170dce1141e8a.pdf
    • https://static.usrfiles.com/ugd/b8c837_d9e7c9bed2094387a6a135083fc17d9a.pdf
    • https://static.usrfiles.com/ugd/09c3c7_83dc8bc669b144ffbed8657eb34093a4.pdf
    • https://cdn.shopify.com/s/files/1/0466/4999/9525/files/black_ops_2_level_hack_pc.pdf
    • https://cdn.shopify.com/s/files/1/0434/0062/6341/files/jegibebapuz.pdf
    • https://cdn.shopify.com/s/files/1/0431/0892/5600/files/78189956350.pdf
    • https://cdn.shopify.com/s/files/1/0428/2525/3023/files/jamosixurofuzexifekibodup.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_off00009b43.bin
5c1de763bf131701d283f4fd3f86d0f693be0c622f94bb94aeb11aaf6b9267a8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9B43 5660 bytes
font_01_sfnt_off0000ae47.bin
4a69a6f5529be1b40d7f2563b4aba6f12bdaeab79d11f8417a22ef86431b4101		 pdf-font-stream PDF embedded font (sfnt) at offset 0xAE47 10420 bytes

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