Malicious PDF — malware analysis report

Static analysis result for SHA-256 033358959c2d93a6…

MALICIOUS

PDF

44.5 KB Created: 2020-08-30 06:58:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 59f08f2bfc6b3195b86b6da8bbacf178 SHA-1: 748e10cfc9c4c0ac66da5f859f61d42651210233 SHA-256: 033358959c2d93a6107cd9670069adebf71994d17c4543a5a0d940339975742c
194 Risk Score

Malware Insights

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

This PDF document contains a large number of embedded links, many of which point to a redirector service. The document body, though partially garbled, includes a URL that is also present in the heuristics as a known malicious redirector. The presence of a password-protected archive lure suggests an attempt to bypass security controls by encrypting a payload. The ML classifier strongly indicates maliciousness.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=hackearbook+%25C3%25A9+confi%25C3%25A1vel
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/a2c2bc_cc62e553474a42b5ae43e3b5cb5accc8.pdf
    • https://static.usrfiles.com/ugd/299074_908a82705cf2434eb73c65d75e89dc33.pdf
    • https://static.usrfiles.com/ugd/76156b_519f5d4be4af4c6584c4d1445fb0b71f.pdf
    • https://static.usrfiles.com/ugd/89064d_926a86ece74944508dbeb5305a6f9e84.pdf
    • https://static.usrfiles.com/ugd/b8c837_6f53ec0b69594ddd80c7ee7099861fe4.pdf
    • https://cdn.shopify.com/s/files/1/0437/9348/1885/files/73241182705.pdf
    • https://cdn.shopify.com/s/files/1/0461/6545/9096/files/baazigar_odia_video.pdf
    • https://cdn.shopify.com/s/files/1/0447/5482/9463/files/jivegixaxe.pdf
    • https://cdn.shopify.com/s/files/1/0434/5472/6310/files/81208800819.pdf
    • https://cdn.shopify.com/s/files/1/0433/5396/4712/files/vatatabigi.pdf
    • https://cdn.shopify.com/s/files/1/0433/8316/0983/files/derikiranabutuwodil.pdf
    • https://cdn.shopify.com/s/files/1/0437/9469/4304/files/agricultural_machinery_engineering.pdf
    • https://cdn.shopify.com/s/files/1/0428/8921/6167/files/66922472090.pdf
    • https://cdn.shopify.com/s/files/1/0429/2640/7833/files/zagebesomuforoj.pdf
    • https://static.usrfiles.com/ugd/b8c837_9a29c14bffb44ce28fe3157b1f5f3a50.pdf
    • https://static.usrfiles.com/ugd/49be48_0f851d7b05e04ffba9ed3cbc321b1076.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_off00006b72.bin
e88e615a2b2570aee9fdfe1d562b01019b3c7081ac42857636880674ce21d333		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B72 5300 bytes
font_01_sfnt_off00007caf.bin
57154a79449b9f9c3582c312f7d241b4a5354514adb55c1074631bf521fe4ed8		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7CAF 12428 bytes

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