Malicious PDF — malware analysis report

Static analysis result for SHA-256 6363cbf6e956a012…

MALICIOUS

PDF

39.3 KB Created: 2020-07-31 23:50:04 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d7443561960e49490f0dbb05a5e0b39c SHA-1: 80b7cbae60abf518181376ef137fce1d8ff87a14 SHA-256: 6363cbf6e956a012bafe9dbc979c621074bcd9b7f81533241b506e6f17b170fb
154 Risk Score

Malware Insights

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

The PDF contains embedded links, with one prominently pointing to a known malicious redirector. The document body, though obfuscated, contains text related to 'Nintendo switch mac address' and the malicious URL, suggesting a phishing lure. The presence of numerous external PDF links further indicates a link farm strategy to obscure the malicious destination.

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=nintendo+switch+mac+address
    • http://files.beyondsoftware.net/uploads/1/3/1/4/131453056/da8b5132520a.pdf
    • http://files.hirneisenhighflyers.com/uploads/1/3/1/8/131872087/pagikunaz.pdf
    • http://files.living-towin.com/uploads/1/3/0/7/130776828/tibori-xulipubu.pdf
    • http://files.cameronheightsmusic.com/uploads/1/3/0/7/130740180/5c19bc30.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/xixuvedivikeror.pdf
    • https://cdn.shopify.com/s/files/1/0431/0705/7825/files/midozavuduzi.pdf
    • https://cdn.shopify.com/s/files/1/0431/3006/0955/files/medizigiki.pdf
    • https://cdn.shopify.com/s/files/1/0432/3596/7143/files/norenetepulov.pdf
    • https://cdn.shopify.com/s/files/1/0430/8546/3713/files/52256410542.pdf
    • https://cdn.shopify.com/s/files/1/0434/0681/9493/files/ginavalobuni.pdf
    • https://cdn.shopify.com/s/files/1/0431/1737/9745/files/95000274687.pdf
    • https://cdn.shopify.com/s/files/1/0440/0663/7726/files/jopisasosuni.pdf
    • https://cdn.shopify.com/s/files/1/0428/2204/1767/files/botejoluludu.pdf
    • https://cdn.shopify.com/s/files/1/0428/2492/5347/files/pedodusajowu.pdf
    • https://cdn.shopify.com/s/files/1/0428/3020/0991/files/jekelixugis.pdf
    • https://cdn.shopify.com/s/files/1/0431/4333/2000/files/wajubezakanorison.pdf
    • https://cdn.shopify.com/s/files/1/0429/9282/8579/files/lalebijaf.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_off000054f8.bin
8cd37e8061e79ae1e1302180105319b4eafe8bd13806c125f59ee56463f27ea7
pdf-font-stream PDF embedded font (sfnt) at offset 0x54F8 5208 bytes
font_01_sfnt_off00006699.bin
92063828e6025384e37b9b8d0748c8d9ad85a9a8176019baaefff594f3db1b11
pdf-font-stream PDF embedded font (sfnt) at offset 0x6699 13232 bytes