Malicious PDF — malware analysis report

Static analysis result for SHA-256 ddcef0f410382415…

MALICIOUS

PDF

42.3 KB Created: 2020-08-29 05:47:25 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 265e006ae8ce7764d69617f2d840e2c6 SHA-1: 89d17165ed1d93bd717ec6b0eabc048a13659081 SHA-256: ddcef0f410382415005ad6cca3f6c5e4095342a675e1e31a0b102e2147ba0d41
154 Risk Score

Malware Insights

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

The PDF document was flagged as malicious by a machine learning classifier and contains a critical heuristic indicating it's a redirector link to a known malicious infrastructure. Additionally, it exhibits characteristics of an SEO link farm, with numerous external PDF links. The primary malicious URL identified is https://ttraff.me/wix?keyword=megaman+sprite+sheet+8+bit, which is likely used to redirect users to further malicious content.

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=megaman+sprite+sheet+8+bit
    • https://static.usrfiles.com/ugd/b8c837_f53a7745d4554776b9e0693b659158fc.pdf
    • https://static.usrfiles.com/ugd/b8c837_9b94b05d034940d8877c2d6facf28444.pdf
    • https://static.usrfiles.com/ugd/b8c837_0509c4930e4f42fbb07dcd56a78f5ac6.pdf
    • https://static.usrfiles.com/ugd/b8c837_eaec37f21ff64c6ca47c91c912292bbe.pdf
    • https://cdn.shopify.com/s/files/1/0437/3856/2712/files/saganeninikosiju.pdf
    • https://cdn.shopify.com/s/files/1/0433/3967/7855/files/diablo_2_manual.pdf
    • https://cdn.shopify.com/s/files/1/0454/7097/4118/files/jawujibomovimipuza.pdf
    • https://cdn.shopify.com/s/files/1/0436/1197/9939/files/pinukeregusudizebokoner.pdf
    • https://cdn.shopify.com/s/files/1/0432/5982/2244/files/cuentos_infantiles_ilustrados.pdf
    • https://static.usrfiles.com/ugd/b8c837_f899fa53e45e4553b2cf508388380be2.pdf
    • https://static.usrfiles.com/ugd/b8c837_ec1581671e9f4cbabdd2bf6ea3278440.pdf
    • https://static.usrfiles.com/ugd/b8c837_68fc379e71e04c61acf0f4fe56d9f134.pdf
    • https://static.usrfiles.com/ugd/b8c837_e687bd6877354514be288505e5b4670b.pdf
    • https://static.usrfiles.com/ugd/b8c837_86daeb866927464e9536b3de5ebb8871.pdf
    • https://static.usrfiles.com/ugd/b8c837_bdcfd85f4cf94ac19686e48e7022ee2b.pdf
    • https://static.usrfiles.com/ugd/b8c837_79014978337143ef8aa256f3ebac420b.pdf
    • https://static.usrfiles.com/ugd/b8c837_ff6e6566936a440e85a3ba496a4781d1.pdf
    • https://static.usrfiles.com/ugd/b8c837_8e081f05ea1440baa367ae5b67838ba9.pdf
    • https://static.usrfiles.com/ugd/b8c837_9f28f964dfbd4c9dbd9f1f6acb0820fe.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000051a9.bin
326cb8f1fb33d7b257c47c1e3eb45420cc55ca83419dd89aee9427495e6bbb2d		 pdf-font-stream PDF embedded font (sfnt) at offset 0x51A9 5540 bytes
font_01_sfnt_off00006457.bin
abd580661aadec14b851226c30c8d8722554939790136ff76c0f8798ae1e1ed4		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6457 9996 bytes
font_02_sfnt_off000086d2.bin
a95eff378c135b1ab40d10b3cd1da1bafbc07f86005f57898d079c90d712ddbd		 pdf-font-stream PDF embedded font (sfnt) at offset 0x86D2 16204 bytes

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