Malicious PDF — malware analysis report

Static analysis result for SHA-256 003719d3d670ca51…

MALICIOUS

PDF

43.2 KB Created: 2020-08-15 06:49:15 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 68a1d40455be0f0a7c68b260f66bd206 SHA-1: 9666e7aae68e4ba1e773642a000079616c60f303 SHA-256: 003719d3d670ca511829fe6a0bb37983972b27de6bcc4fd392486eb585b91abd
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Spearphishing Attachment T1059.001 PowerShell T1204.002 Malicious Link

The PDF contains a mass external link farm, with one URL pointing to a known malicious redirector. The document body, though heavily obfuscated, contains text related to an 'artificial intelligence seminar ppt' and the malicious URL. This suggests a phishing or social engineering attempt to redirect users to malicious 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.ru/pify?keyword=artificial+intelligence+seminar+ppt
    • http://files.holysoulschurch.co.uk/uploads/1/3/0/9/130969820/riwugu.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0439/0433/6040/files/10705443678.pdf
    • https://cdn.shopify.com/s/files/1/0428/0349/5071/files/agama_islam_di_malaysia.pdf
    • https://cdn.shopify.com/s/files/1/0437/4190/5045/files/50407160649.pdf
    • https://cdn.shopify.com/s/files/1/0433/4950/8246/files/34401695084.pdf
    • https://cdn.shopify.com/s/files/1/0447/0964/2394/files/cefalotina_vademecum.pdf
    • https://cdn.shopify.com/s/files/1/0435/2249/0532/files/zelda_chest_sound.pdf
    • https://cdn.shopify.com/s/files/1/0434/7772/9432/files/pinabefevamapixomosa.pdf
    • https://cdn.shopify.com/s/files/1/0435/3500/7893/files/84020114553.pdf
    • https://cdn.shopify.com/s/files/1/0433/0687/7080/files/pifafesilepobusofamut.pdf
    • https://cdn.shopify.com/s/files/1/0434/5420/2018/files/33421377985.pdf
    • https://cdn.shopify.com/s/files/1/0438/9958/4664/files/63976230546.pdf
    • https://cdn.shopify.com/s/files/1/0430/2739/8807/files/siliranapizonovojupezuweb.pdf
    • https://cdn.shopify.com/s/files/1/0427/6423/9014/files/balance_of_payment_of_pakistan_2020.pdf
    • https://cdn.shopify.com/s/files/1/0430/9463/8749/files/robufamikam.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_off000069af.bin
a02364ae830a145bfc79bb8a3b29fd396de77a6feb9d2008a2af7874ba04e279
pdf-font-stream PDF embedded font (sfnt) at offset 0x69AF 5324 bytes
font_01_sfnt_off00007bb0.bin
400c962fc6dea64084e91af7413a50d3b3875acad969c483491aac1adfcfb70d
pdf-font-stream PDF embedded font (sfnt) at offset 0x7BB0 10048 bytes