Malicious PDF — malware analysis report

Static analysis result for SHA-256 c9ee87b4dcbc5353…

MALICIOUS

PDF

62.6 KB Created: 2020-08-22 04:49:42 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 5e1e68ec744234b44290b6f9e75766be SHA-1: 80271b8a0085df31694f938da623cb591117b704 SHA-256: c9ee87b4dcbc535385762466a6a1a8c75a9663d11a2f0b11a6286613538d7318
120 Risk Score

Malware Insights

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

The PDF file contains a large number of embedded links, many of which point to a link farm hosted on Shopify. One of these links, 'https://ttraff.com/pify?keyword=asuhan+keperawatan+endometriosis+pdf', is identified as a malicious redirector. The document body, though heavily obfuscated, contains references to 'Asuhan keperawatan endometriosis pdf' and 'wkhtmltopdf', suggesting a lure to disguise malicious content as a research document. The presence of numerous external links indicates an attempt to distribute content or redirect users to malicious sites.

Heuristics 3

  • 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.
  • 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=asuhan+keperawatan+endometriosis+pdf
    • http://kefifetoz.fleuretbeautenv.com/uploads/1/3/0/9/130969488/menorikexetumej.pdf
    • http://files.dirtydavesdetailing.com/uploads/1/3/0/8/130813755/kirifut.pdf
    • http://mojox.clintoncountyleader.com/uploads/1/3/1/4/131408100/2089484.pdf
    • http://files.charlotterodenberg.com/uploads/1/3/0/8/130813755/1170bfc2fab2.pdf
    • https://cdn.shopify.com/s/files/1/0432/3649/1431/files/pollard_a_user_guide_to_measure_theoretic_probability.pdf
    • https://cdn.shopify.com/s/files/1/0429/7441/2949/files/sydney_weekend_auction_results.pdf
    • https://cdn.shopify.com/s/files/1/0434/0921/1557/files/88086480981.pdf
    • https://cdn.shopify.com/s/files/1/0430/0609/9605/files/tofitivipikaseto.pdf
    • https://cdn.shopify.com/s/files/1/0432/5687/3128/files/6228263579.pdf
    • https://cdn.shopify.com/s/files/1/0440/8141/4296/files/66245287995.pdf
    • https://cdn.shopify.com/s/files/1/0430/7651/8049/files/bagavorajagajezubikawe.pdf
    • https://cdn.shopify.com/s/files/1/0429/6556/5589/files/global_business_strategy_asian_perspective.pdf
    • https://cdn.shopify.com/s/files/1/0431/7646/0447/files/free_twin_loft_bed_plans.pdf
    • https://cdn.shopify.com/s/files/1/0447/4263/9765/files/bleeding_time_test_procedure.pdf
    • https://cdn.shopify.com/s/files/1/0435/2779/8943/files/verizon_real_ringtones.pdf
    • https://cdn.shopify.com/s/files/1/0431/8196/5474/files/bichoo_mp4_video_songs.pdf
    • https://cdn.shopify.com/s/files/1/0428/5107/4214/files/sample_critical_analysis_paper.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_off0000b80a.bin
c897f40bea6fdb584c5ff15f5de7a0fdbdba074b729c06623f35a0410d1c51a8
pdf-font-stream PDF embedded font (sfnt) at offset 0xB80A 5396 bytes
font_01_sfnt_off0000ca45.bin
a4b002b9da72d54f52628345ae13766aaa2305f461575ccec1507114f5c521b8
pdf-font-stream PDF embedded font (sfnt) at offset 0xCA45 10184 bytes