Malicious PDF — malware analysis report

Static analysis result for SHA-256 67db3e3b18681ecd…

MALICIOUS

PDF

41.1 KB Created: 2020-09-08 06:04:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: f7110de10fa1d6177f5953ff746fd143 SHA-1: 5c812beec5e81b2b6705916198ccc3d5ac5522bf SHA-256: 67db3e3b18681ecd7aebbfed6c1e148c78d27371f8b82d407faf96a9364b8f04
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

This PDF document contains a large number of embedded links, many of which point to a redirector service known for malicious activity. The document body, though heavily obfuscated, contains the URL 'https://ttraff.link/wix?keyword=limited+liability+company+partnership+answer+book', which is flagged as a malicious redirector. The presence of numerous links, including one to a potentially benign Shopify URL, suggests an attempt to create a link farm or to direct users to malicious content under the guise of providing resources.

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.link/wix?keyword=limited+liability+company+partnership+answer+book
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0431/3301/0082/files/microeconomics_krugman_3rd_edition_download.pdf
    • https://cdn.shopify.com/s/files/1/0429/9869/4049/files/vogizilaw.pdf
    • https://cdn.shopify.com/s/files/1/0434/4024/2840/files/vimafelodopofilalosiganup.pdf
    • https://cdn.shopify.com/s/files/1/0469/5100/6369/files/93097045762.pdf
    • https://cdn.shopify.com/s/files/1/0435/5683/1395/files/mizizebe.pdf
    • https://static.usrfiles.com/ugd/9f06f8_61501bc3e0cb4cd38c61cc4d1c637983.pdf
    • https://static.usrfiles.com/ugd/ecec20_f3e2711e267144d083c643781e2bd31e.pdf
    • https://static.usrfiles.com/ugd/0789d5_77dd2d2b345d4efab4c470b0910b7a41.pdf
    • https://static.usrfiles.com/ugd/868b90_782d785378ce4b55b99fa5a91d11476f.pdf
    • https://static.usrfiles.com/ugd/2c608b_af63ebde4d8d4be19f470dc12c6a1f77.pdf
    • https://cdn.shopify.com/s/files/1/0434/7055/3238/files/xenabagexaz.pdf
    • https://cdn.shopify.com/s/files/1/0437/0500/8293/files/71748804471.pdf
    • https://cdn.shopify.com/s/files/1/0465/8724/8805/files/ales_matematik_konu_anlatm_enol_hoca.pdf
    • https://cdn.shopify.com/s/files/1/0437/4704/9621/files/the_emperor_s_new_groove_trailer.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/38746106010.pdf
    • https://cdn.shopify.com/s/files/1/0429/6291/1391/files/20129065378.pdf
    • https://cdn.shopify.com/s/files/1/0435/0207/6070/files/23722477614.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_off00006014.bin
b8161a3dc7d0c0c89686859bbc2a511fed833409f6cec625cfcfb6daaf0e9308		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6014 5652 bytes
font_01_sfnt_off00007335.bin
d630c08230745404ce56b755a7c8dec2100cfac03312918de67b3cfdcf9833f0		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7335 10704 bytes

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