Malicious PDF — malware analysis report

Static analysis result for SHA-256 fccb00e0a0e0c278…

MALICIOUS

PDF

45.5 KB Created: 2020-08-04 17:51:50 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 38d2b20f3efb66932c694e06790234f2 SHA-1: d3ec2b8baf562fb3fff597103ae44715953279bc SHA-256: fccb00e0a0e0c27844f94d0570ba3232a10ce25454f2132dbe46b9b5d65035fb
152 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell

The PDF contains a mass of external links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier strongly indicated maliciousness. The document body, though heavily obfuscated, contains the URL that triggers the malicious redirector, suggesting the PDF's primary purpose is to lead users to malicious infrastructure.

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.com/pify?keyword=din+en+iso+4042+pdf
    • http://files.noarderljocht.com/uploads/1/3/1/4/131437984/reluwidiwarom.pdf
    • http://files.europetothepeople.eu/uploads/1/3/2/6/132695372/viwududa.pdf
    • http://tipad.specialeducation360x.info/uploads/1/3/1/3/131383613/kalat.pdf
    • http://files.turningpointchurchofmadison.com/uploads/1/3/2/6/132681501/2a1fe470c9f96c1.pdf
    • http://files.insituvision.com/uploads/1/3/1/4/131437671/nimod_feragitufu.pdf
    • https://cdn.shopify.com/s/files/1/0430/8749/5321/files/vimimuxizemutun.pdf
    • https://cdn.shopify.com/s/files/1/0432/6345/9486/files/7317221647.pdf
    • https://cdn.shopify.com/s/files/1/0431/7390/4545/files/kalanonebelapozorufod.pdf
    • https://cdn.shopify.com/s/files/1/0434/6078/8390/files/zupiw.pdf
    • https://cdn.shopify.com/s/files/1/0433/6487/6453/files/74651348468.pdf
    • https://cdn.shopify.com/s/files/1/0435/2029/5064/files/30963126823.pdf
    • https://cdn.shopify.com/s/files/1/0432/2312/2084/files/63421177871.pdf
    • https://cdn.shopify.com/s/files/1/0438/4718/8640/files/luvuropijatuzuruga.pdf
    • https://cdn.shopify.com/s/files/1/0434/7409/2198/files/70252754178.pdf
    • https://cdn.shopify.com/s/files/1/0429/0225/7823/files/sanejale.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/89120948070.pdf
    • https://cdn.shopify.com/s/files/1/0433/5799/5160/files/fapesogokilipova.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_off0000697a.bin
9b5e7c0832ceef2d886f4f8e76af8dd903e9c0c3bd6feb06337811f876704201
pdf-font-stream PDF embedded font (sfnt) at offset 0x697A 5056 bytes
font_01_sfnt_off00007ad9.bin
09c8061aa9a7d65e006741636ba5de9b6f9de6ba872c83a2295f33dc011cbeda
pdf-font-stream PDF embedded font (sfnt) at offset 0x7AD9 14772 bytes