Malicious PDF — malware analysis report

Static analysis result for SHA-256 0933df279560f9e6…

MALICIOUS

PDF

33.6 KB Created: 2020-08-28 03:48:53 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 63f81493a338f8f6c225721ce14d3345 SHA-1: 28c31f5d4888eb74a936820a7228389d5bcde8ba SHA-256: 0933df279560f9e67f69e287961de7b800466c3d6942b9c02f769cd334bc10f8
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF file, disguised as a 'Dkny dress size guide', contains a large number of embedded links. One of these links, 'https://ttraff.cc/pify?keyword=dkny+dress+size+guide', points to a known malicious redirector. The presence of numerous links, many pointing to benign Shopify URLs, suggests an attempt to obscure the malicious destination and potentially engage in SEO manipulation or link farming, while the primary malicious intent is to redirect the user to a harmful site.

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=dkny+dress+size+guide
    • http://files.operationimagination.com/uploads/1/3/0/8/130874257/limopaku.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/7551/8107/files/accurate_english_pronunciation.pdf
    • https://cdn.shopify.com/s/files/1/0438/9080/2856/files/action_research_methodology.pdf
    • https://cdn.shopify.com/s/files/1/0465/4176/6814/files/sinodejidow.pdf
    • https://cdn.shopify.com/s/files/1/0432/1935/3767/files/urllib2_vs_urllib3.pdf
    • https://cdn.shopify.com/s/files/1/0435/5339/0743/files/accounting_audit_report_template.pdf
    • https://cdn.shopify.com/s/files/1/0437/6756/2391/files/83316142333.pdf
    • https://cdn.shopify.com/s/files/1/0434/2104/0792/files/25776969841.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/kemisavixazesunomezixe.pdf
    • https://cdn.shopify.com/s/files/1/0431/6345/1560/files/66433032586.pdf
    • https://cdn.shopify.com/s/files/1/0429/2896/3747/files/sokiregoposaletefe.pdf
    • https://cdn.shopify.com/s/files/1/0437/7201/8845/files/game_beach_buggy_racing_hack.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_off000046ee.bin
bff529452730c0962595ea56960bd5a30f92cc53c9a856e822de7c1adc63c67e
pdf-font-stream PDF embedded font (sfnt) at offset 0x46EE 4964 bytes
font_01_sfnt_off000057f6.bin
aafa662bf43e9d9fe463eda0204d28230dba468a493c6881bff228cb56f8828f
pdf-font-stream PDF embedded font (sfnt) at offset 0x57F6 9932 bytes