Malicious PDF — malware analysis report

Static analysis result for SHA-256 60359b0b76cea880…

MALICIOUS

PDF

45.8 KB Created: 2020-07-27 09:49:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: e340e1950cc6edf2de2d6e0360f2c795 SHA-1: 2991180d2df6ef92133db7c228ca0ca8f4b5a734 SHA-256: 60359b0b76cea880796f5a171897aa41519220cbf68a19143e44c15e8c0915c9
194 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment T1059.007 JavaScript T1203 Exploitation for Client Execution

The PDF contains multiple embedded URLs, with one pointing to a known malicious redirector. The document body, though heavily obfuscated, suggests a lure related to 'admin password cracker software free'. The heuristic firings indicate the PDF is designed to redirect users to malicious sites and contains a large number of external links, likely for SEO manipulation or to host further malicious content. The presence of a password-protected archive lure suggests a multi-stage attack.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

Heuristics 5

  • 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.
  • Password-protected archive handoff high SE_PASSWORD_ARCHIVE_LURE
    Document gives password instructions for an archive or attachment — often used to keep payloads encrypted until after gateway scanning
  • 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=admin+password+cracker+software+free
    • http://files.asiamannwellness.com/uploads/1/3/0/7/130739143/vupafomoliveda.pdf
    • http://files.dylanness.com/uploads/1/3/0/9/130969819/860cb.pdf
    • http://files.aecnwa.com/uploads/1/3/0/9/130968942/mujetifefi.pdf
    • http://files.gchschautauqua.com/uploads/1/3/1/3/131379724/kifaxobixu_vebaxew_kabop_tevof.pdf
    • http://files.gtc-elite.org/uploads/1/3/2/6/132682570/netefikuvuboz_fifajog_jubakafa.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0432/6418/0390/files/gadipizubowefajeg.pdf
    • https://cdn.shopify.com/s/files/1/0431/9982/4032/files/webufataxidokisudiwami.pdf
    • https://cdn.shopify.com/s/files/1/0433/5281/7832/files/5225290881.pdf
    • https://cdn.shopify.com/s/files/1/0432/6614/6472/files/jupegubutaribujuwunusube.pdf
    • https://cdn.shopify.com/s/files/1/0430/4211/1650/files/5440395502.pdf
    • https://cdn.shopify.com/s/files/1/0437/4655/8106/files/51634915994.pdf
    • https://cdn.shopify.com/s/files/1/0427/6636/8935/files/sebedugo.pdf
    • https://cdn.shopify.com/s/files/1/0429/8774/9525/files/84261796496.pdf
    • https://cdn.shopify.com/s/files/1/0428/9835/8432/files/xekosipavejidowusa.pdf
    • https://cdn.shopify.com/s/files/1/0429/1035/1513/files/94852114873.pdf
    • https://cdn.shopify.com/s/files/1/0427/7967/2735/files/24850855630.pdf
    • https://cdn.shopify.com/s/files/1/0434/6016/5797/files/negodo.pdf
    • https://cdn.shopify.com/s/files/1/0429/5114/7679/files/denarezokokifu.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_off0000741a.bin
8b34d175ed04b825f84f9bcffe65d7dae0202fc7b2a841672606293f20a6e9de		 pdf-font-stream PDF embedded font (sfnt) at offset 0x741A 5204 bytes
font_01_sfnt_off000085b9.bin
0a68f3cebae71042535150594d32987871f59d99ff10ac776789db7fe63fbf72		 pdf-font-stream PDF embedded font (sfnt) at offset 0x85B9 10560 bytes

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