Malicious PDF — malware analysis report

Static analysis result for SHA-256 01fcd5ac2a10f485…

MALICIOUS

PDF

43.2 KB Created: 2020-08-31 03:29:28 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15e5d22075d4fa3425f82b49056f77d8 SHA-1: d6298abc663c49b9aa0cea00d712f2a69dee5464 SHA-256: 01fcd5ac2a10f48552f2ea206dab7e9e3808a86053062ac548876d4ff7383ef0
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript

The PDF contains a link farm and a redirector to malicious infrastructure, as indicated by the PDF_MALICIOUS_REDIRECTOR_LINK and PDF_SEO_LINK_FARM heuristics. The embedded URL https://ttraff.cc/wix?keyword=sims+freeplay+hack+apk is designed to trick users into downloading potentially harmful content. The ML classifier also strongly flagged this PDF as malicious.

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/wix?keyword=sims+freeplay+hack+apk
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/b8c837_5f5df364077b4c2c9bb7c1e71aeafdba.pdf
    • https://static.usrfiles.com/ugd/0779a3_6c0be5f9a36349c1bdddf6e0e23c2299.pdf
    • https://static.usrfiles.com/ugd/b8c837_e2a383a491994bdb800dbf6807dcff9c.pdf
    • https://static.usrfiles.com/ugd/a43ec6_e10e29e858ee46b7b8e2cb098b2418ab.pdf
    • https://static.usrfiles.com/ugd/b8c837_aad9bfa8932b404c8e8472955442502f.pdf
    • https://cdn.shopify.com/s/files/1/0430/3139/6503/files/pdf_merge_portable.pdf
    • https://cdn.shopify.com/s/files/1/0428/0962/2687/files/tofumizi.pdf
    • https://cdn.shopify.com/s/files/1/0430/2376/1571/files/57375167477.pdf
    • https://cdn.shopify.com/s/files/1/0447/0643/1130/files/p90x_workout.pdf
    • https://cdn.shopify.com/s/files/1/0430/4021/1105/files/rojuxatupuzowop.pdf
    • https://static.usrfiles.com/ugd/b8c837_406e5f5349dd4ea8af05a25f436413b7.pdf
    • https://static.usrfiles.com/ugd/ff2e72_2465b7563fee4ea0a68f773439c0767d.pdf
    • https://static.usrfiles.com/ugd/89064d_9a006ca59e0a43b2b5428dd919fc2165.pdf
    • https://cdn.shopify.com/s/files/1/0433/1955/8299/files/xemasudopanesu.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/negopolikutowuz.pdf
    • https://cdn.shopify.com/s/files/1/0430/1602/8309/files/sonuf.pdf
    • https://cdn.shopify.com/s/files/1/0429/1903/5033/files/ansi_c_language_reference_manual.pdf
    • https://cdn.shopify.com/s/files/1/0437/8918/9272/files/mabater.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_off000069d2.bin
bd6aa102245c0c84cd5bb9510d35a7467c90ea3b2179dff111259a03a7621789		 pdf-font-stream PDF embedded font (sfnt) at offset 0x69D2 5524 bytes
font_01_sfnt_off00007c70.bin
f261201a640e4b738f606256aedcf6a2b53318161290970ac87eb60d6799aeeb		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7C70 10420 bytes

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