Malicious PDF — malware analysis report

Static analysis result for SHA-256 34f332de90de3b21…

MALICIOUS

PDF

42.1 KB Created: 2020-08-14 01:50:19 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: ec8030b228ab6dd82283ab30ea9ea6b6 SHA-1: 951fd8d0f76b3629a2e2ef2bf59aa86818b897cd SHA-256: 34f332de90de3b21ad2a3bb7218a2767502a0880eadc4d319ef0489e00949241
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 pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. The document body is heavily obfuscated but contains the malicious URL, suggesting the PDF's primary purpose is to redirect users to potentially harmful content.

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/pify?keyword=colorful+leaves+template
    • http://files.sunburyhealthcentre-ppg.com/uploads/1/3/1/6/131606271/d85793fb3445.pdf
    • http://ginim.inharmonymeditation.com/uploads/1/3/1/4/131452883/werizebokozugap.pdf
    • http://files.cotton-bale-market.com/uploads/1/3/2/7/132741194/3376746.pdf
    • https://cdn.shopify.com/s/files/1/0432/7945/0272/files/guvukuwaxapidemulavokog.pdf
    • https://cdn.shopify.com/s/files/1/0434/8215/3112/files/nogebukevasebozimexe.pdf
    • https://cdn.shopify.com/s/files/1/0432/9514/6139/files/38000539565.pdf
    • https://cdn.shopify.com/s/files/1/0431/7839/3762/files/free_minecraft_account_and_password.pdf
    • https://cdn.shopify.com/s/files/1/0434/4276/5976/files/rozumekudefogupabegoxu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8716/7645/files/42695736141.pdf
    • https://cdn.shopify.com/s/files/1/0449/5890/8584/files/l_carpetron_dookmarriot.pdf
    • https://cdn.shopify.com/s/files/1/0430/0200/3615/files/25828853433.pdf
    • https://cdn.shopify.com/s/files/1/0430/4093/1991/files/microsoft_azure_certification_books.pdf
    • https://cdn.shopify.com/s/files/1/0431/5981/4306/files/jusodiwogozemivili.pdf
    • https://cdn.shopify.com/s/files/1/0433/2892/9947/files/damed.pdf
    • https://cdn.shopify.com/s/files/1/0429/8987/9445/files/31095787462.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_off00006752.bin
93dae57ff153dc7bb09927e4b74ea2145d78f91acba87f102c428a350be1a4b7
pdf-font-stream PDF embedded font (sfnt) at offset 0x6752 5012 bytes
font_01_sfnt_off00007848.bin
b231c603e5ab9f282a1979d1f15e330c155414b3c9a3dd1a64d049d3b6c93c42
pdf-font-stream PDF embedded font (sfnt) at offset 0x7848 10308 bytes