Malicious PDF — malware analysis report

Static analysis result for SHA-256 2ee0a03f94054de4…

MALICIOUS

PDF

49.4 KB Created: 2020-08-30 18:06:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 15740f2a484804de52716ebad33fdba6 SHA-1: 0a30e376ac6c8d3a7b1c76e3dedd32c2ba09abdd SHA-256: 2ee0a03f94054de4e5499d33cde69d5588cbd641bb15ead85d0e74dbb9ecf87e
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, pointing to 'https://ttraff.cc/wix?keyword=csp+download+material+folder'. This URL is likely intended to lead the user to malicious content. The document body also contains this URL and a list of other URLs hosted on Shopify, which are likely part of a link farm designed to improve search engine ranking for malicious 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=csp+download+material+folder
    • https://cdn.shopify.com/s/files/1/0431/0227/3703/files/diradamigex.pdf
    • https://cdn.shopify.com/s/files/1/0437/1100/4821/files/tenulojomideveb.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/giratajolexodomofavewolov.pdf
    • https://cdn.shopify.com/s/files/1/0436/9291/6886/files/five_nights_at_freddys_game_free_do.pdf
    • https://cdn.shopify.com/s/files/1/0431/6112/5015/files/20178144053.pdf
    • https://cdn.shopify.com/s/files/1/0427/9474/6023/files/81266590040.pdf
    • https://cdn.shopify.com/s/files/1/0431/1682/2692/files/sudakojabemujurewive.pdf
    • https://cdn.shopify.com/s/files/1/0431/3337/0529/files/white_christmas_sheet_music_piano_free.pdf
    • https://cdn.shopify.com/s/files/1/0436/4215/9257/files/boy_scout_oath_in_sign_language.pdf
    • https://cdn.shopify.com/s/files/1/0435/8645/3663/files/ladesusunitujisizuk.pdf
    • https://static.usrfiles.com/ugd/b8c837_e457ef8d9ca54f368d538eec07eb97c9.pdf
    • https://static.usrfiles.com/ugd/b8c837_a6b1f197b51947cfb8d0d19ce9cda23c.pdf
    • https://static.usrfiles.com/ugd/e2c250_c0b7ba79caa7442bb31d0121574228d3.pdf
    • https://static.usrfiles.com/ugd/4c1554_3e61140fd83947aeb3986e89d91c048b.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 2

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00008416.bin
83ec22d9775e4445f20a772faa9890b7631b99d025221eb62cdb69d772d4a768
pdf-font-stream PDF embedded font (sfnt) at offset 0x8416 5184 bytes
font_01_sfnt_off000095b2.bin
24d14f576efa1bebf8d182f8c737fd047b7de96393a699a6449f4fac996513d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x95B2 10088 bytes