Malicious PDF — malware analysis report

Static analysis result for SHA-256 01dd55c5e4b3b5cc…

MALICIOUS

PDF

46.4 KB Created: 2020-09-08 19:45:37 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 7226b87940007b0c6149c08e33bcb54f SHA-1: 628ce2dab018071524a7694b2e48b79b9792639d SHA-256: 01dd55c5e4b3b5ccd70a259136179eebbcf9d2e6bc887978a3b865d3fdcbfaf5
154 Risk Score

Malware Insights

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

The PDF contains a link to a known malicious redirector, disguised with a search query for a commercial product. The PDF also hosts a large number of links to other PDFs, likely for SEO manipulation or to distribute further malicious content. The ML classifier strongly indicated maliciousness, and the overall structure suggests a phishing or scam attempt.

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=cuddl+duds+full+size+sheets
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://static.usrfiles.com/ugd/d9e9a0_149d635f85e849f3b6703daf40aef3f7.pdf
    • https://static.usrfiles.com/ugd/8b97dd_95749051d5d64507b220980a4f7827a9.pdf
    • https://static.usrfiles.com/ugd/2b98a3_fb18b675652b44369f55a9c0a7b11790.pdf
    • https://static.usrfiles.com/ugd/cbe7f7_cf6fd92c8849488898a0f9015562280f.pdf
    • https://static.usrfiles.com/ugd/4c76bf_99110ed3bab44aa5b953ec03aca0b904.pdf
    • https://static.usrfiles.com/ugd/07ef24_3f362a747d6a4ac19f8ebae0394ebbc5.pdf
    • https://cdn.shopify.com/s/files/1/0436/3878/4158/files/nenawusajitixalupa.pdf
    • https://cdn.shopify.com/s/files/1/0434/6534/3141/files/24174307956.pdf
    • https://cdn.shopify.com/s/files/1/0428/5582/5567/files/10225267523.pdf
    • https://cdn.shopify.com/s/files/1/0437/2892/8920/files/zebil.pdf
    • https://cdn.shopify.com/s/files/1/0431/4932/8533/files/33120946476.pdf
    • https://cdn.shopify.com/s/files/1/0435/2190/0696/files/nizefipomugelaba.pdf
    • https://cdn.shopify.com/s/files/1/0431/1869/0458/files/2973876111.pdf
    • https://cdn.shopify.com/s/files/1/0437/6654/6583/files/can_t_battlefield_5_beta_ps4.pdf
    • https://cdn.shopify.com/s/files/1/0467/8146/4729/files/historia_de_la_escritura.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_off00007a36.bin
31e6620a1b7b45c360146d9086f741576c1c96ab1191fa40c8ad702bb4cd9cc9
pdf-font-stream PDF embedded font (sfnt) at offset 0x7A36 4644 bytes
font_01_sfnt_off00008a07.bin
f265517f556b88f1a383f7cda21e6774505f2fe53f73c6b579f40de7319c04d7
pdf-font-stream PDF embedded font (sfnt) at offset 0x8A07 10272 bytes