Malicious PDF — malware analysis report

Static analysis result for SHA-256 54ad153e8d0446ca…

MALICIOUS

PDF

36.6 KB Created: 2020-09-02 09:22:49 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 2540ad7d6948df785b05648f6c062aea SHA-1: 252cd3660565f9c07580a6283d376aff8ccc6394 SHA-256: 54ad153e8d0446cacf1f00ef0d8324a0e521d2bde78f0a14319d5bdb430df367
154 Risk Score

Malware Insights

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

The PDF contains a large number of embedded links, many of which point to Shopify domains hosting other PDFs, suggesting a link farm or SEO poisoning tactic. One critical heuristic identified a link to a known malicious redirector infrastructure. The document body, though heavily obfuscated, contains the text "Integrated reporting best examples" and the malicious redirector URL, indicating a lure to a potentially harmful site.

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=integrated+reporting+best+examples
    • https://cdn.shopify.com/s/files/1/0434/5361/2199/files/fugotewaxe.pdf
    • https://cdn.shopify.com/s/files/1/0431/4847/6570/files/metofodixubajidizep.pdf
    • https://cdn.shopify.com/s/files/1/0429/5078/7231/files/zavolivav.pdf
    • https://static.usrfiles.com/ugd/96bf9d_0a6b1e1ef3aa464095506120f3a932a7.pdf
    • https://static.usrfiles.com/ugd/b8c837_0c8b1af368a5444db9c8fd87488e483f.pdf
    • https://static.usrfiles.com/ugd/47b1e8_855d0383d9da43a5a1cc1e8d9ec305ad.pdf
    • https://cdn.shopify.com/s/files/1/0430/4466/7553/files/acids_and_bases_pogil_answers_extension_questions.pdf
    • https://cdn.shopify.com/s/files/1/0431/2491/6388/files/fufaronimosowuzus.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/ferenap.pdf
    • https://cdn.shopify.com/s/files/1/0441/4432/8856/files/17758839546.pdf
    • https://cdn.shopify.com/s/files/1/0429/6241/9863/files/39273750691.pdf
    • https://cdn.shopify.com/s/files/1/0439/5397/9550/files/86620123730.pdf
    • https://cdn.shopify.com/s/files/1/0463/4014/5313/files/zojiwefasosubiwapinetu.pdf
    • https://cdn.shopify.com/s/files/1/0434/5135/1200/files/automate_the_boring_stuff_python_download.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off00004643.bin
73b46a7e9ce72d44553dc630c5460e40e11f3c9d4b1354804f4c5f784eca9bad
pdf-font-stream PDF embedded font (sfnt) at offset 0x4643 5212 bytes
font_01_sfnt_off000057d2.bin
719064c533503907eeb1e30e4670709f7442c13c5fe7eead41cfa34f6274bc1e
pdf-font-stream PDF embedded font (sfnt) at offset 0x57D2 9280 bytes
font_02_sfnt_off00007781.bin
ff5f0ef16caf3e97cd1984b3a03ea88e11eab8cf63d2ee006085a4b9995833f3
pdf-font-stream PDF embedded font (sfnt) at offset 0x7781 4324 bytes