Malicious PDF — malware analysis report

Static analysis result for SHA-256 e176615f3ab41959…

MALICIOUS

PDF

99.3 KB Created: 2020-08-17 10:24:59 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 276206bc1da3481eb102d2438b460501 SHA-1: 326d18341c26fad05e4473b36477d2e4165f92ea SHA-256: e176615f3ab419597fc0164520000c013b990e92fc0d2561ff4a9544c6e47dc4
154 Risk Score

Malware Insights

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

The PDF contains a high number of embedded links, many pointing to Shopify domains, but one critical link directs to a known malicious redirector. The ML classifier also strongly flagged this PDF as malicious. The document body, though heavily obfuscated, contains the malicious URL, suggesting the primary intent is to redirect the user to a malicious site, likely for phishing or a scam. No scripts were extracted from this sample.

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=ambulance+uniform+store
    • http://defadad.emmadurkanmusic.co.uk/uploads/1/3/2/6/132695818/9995841.pdf
    • https://cdn.shopify.com/s/files/1/0440/8573/9670/files/bengali_wedding_rituals.pdf
    • https://cdn.shopify.com/s/files/1/0435/3762/9348/files/argumentao_e_retrica.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/miveguxuxububepevomozit.pdf
    • https://cdn.shopify.com/s/files/1/0437/5291/5098/files/xorujotivizuzulinosus.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3749/files/fotapukogesoduma.pdf
    • https://cdn.shopify.com/s/files/1/0440/4248/5910/files/96119462814.pdf
    • https://cdn.shopify.com/s/files/1/0433/9033/7182/files/16178518487.pdf
    • https://cdn.shopify.com/s/files/1/0438/4597/6221/files/xeremaxilos.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/getodenosikopu.pdf
    • https://cdn.shopify.com/s/files/1/0432/0336/2973/files/94336830588.pdf
    • https://cdn.shopify.com/s/files/1/0432/1814/1341/files/liderazgo_transformacional_caracteristicas_ventajas_y_desventajas.pdf
    • https://cdn.shopify.com/s/files/1/0429/5675/1002/files/sonibazumupebomumax.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_off00014029.bin
bab0b9c018d70910b9c08cbe520faeff916df0324a379a5c64e6d4999e595e14
pdf-font-stream PDF embedded font (sfnt) at offset 0x14029 5156 bytes
font_01_sfnt_off00015195.bin
8479e9462d9ec63dd82d3a2249b2202d935653ec4819b06c6d349bd177afb706
pdf-font-stream PDF embedded font (sfnt) at offset 0x15195 15068 bytes