Malicious PDF — malware analysis report

Static analysis result for SHA-256 1fa954534b52819e…

MALICIOUS

PDF

39.8 KB Created: 2020-08-27 17:08:36 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: bb3ec1d661ef7d19165519952f86a03b SHA-1: 1aa79c19278773c6a7c452e02f7d2bc06f2885fc SHA-256: 1fa954534b52819ed7488d78e8295adfdbad6e0b2aeb87b50b44371409ee6632
150 Risk Score

Malware Insights

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

The PDF document exhibits characteristics of a link farm, embedding numerous external links. One critical heuristic identified a link to a known malicious redirector at 'https://ttraff.cc/pify?keyword=the+digital+filmmaking+handbook+5th', suggesting a phishing or malware distribution attempt. The ML classifier also strongly flagged this PDF as malicious. No scripts were extracted, but the sheer volume of embedded links points to a malicious intent, likely to lure users to compromised sites.

Machine Learning

  • Nyx PDF Classifier malicious score 1.0000

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.cc/pify?keyword=the+digital+filmmaking+handbook+5th
    • http://files.corezone.online/uploads/1/3/0/7/130739614/691f58f83a55.pdf
    • http://jireg.conservatoryathome.com/uploads/1/3/1/6/131606255/6775934.pdf
    • http://files.dreammasterbuild.com/uploads/1/3/2/6/132696174/06578fc3663db.pdf
    • http://files.charlestonctc.com/uploads/1/3/0/8/130813851/644a0ec8bf5189.pdf
    • https://cdn.shopify.com/s/files/1/0432/8144/9126/files/zisaseluwuxugamazogivira.pdf
    • https://cdn.shopify.com/s/files/1/0436/1538/7811/files/school_lesson_plan_template.pdf
    • https://cdn.shopify.com/s/files/1/0433/9594/0519/files/scribblenauts_unlimited_level_guide.pdf
    • https://cdn.shopify.com/s/files/1/0428/1932/2022/files/26745420586.pdf
    • https://cdn.shopify.com/s/files/1/0428/2944/7335/files/pupifuruget.pdf
    • https://cdn.shopify.com/s/files/1/0429/1995/2540/files/scratch_jr_lessons.pdf
    • https://cdn.shopify.com/s/files/1/0438/8706/7291/files/ludajudopetavixod.pdf
    • https://cdn.shopify.com/s/files/1/0427/9920/2467/files/vevebokodupunukox.pdf
    • https://cdn.shopify.com/s/files/1/0427/9762/9596/files/satodegojoga.pdf
    • https://cdn.shopify.com/s/files/1/0431/6558/1469/files/ziwefufafepuzofevav.pdf
    • https://cdn.shopify.com/s/files/1/0438/4089/7181/files/sizizapisalarubo.pdf
    • https://cdn.shopify.com/s/files/1/0430/7887/7337/files/miwanal.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 3

Files carved from inside the sample during analysis.

FilenameKindSourceSize
font_00_sfnt_off000050ef.bin
fe337ca5739c19053cae992eab01bf35dec60349ad39b402a16ad7e624f90939
pdf-font-stream PDF embedded font (sfnt) at offset 0x50EF 5112 bytes
font_01_sfnt_off00006237.bin
1c283febce73c92300df681f6de0b75df01fbdaf90a9eb888b1c8270a4da3f1b
pdf-font-stream PDF embedded font (sfnt) at offset 0x6237 9908 bytes
font_02_sfnt_off00008429.bin
9f355172d696dda274cac500966718f112ce76951f19577ac4888987ea6471b2
pdf-font-stream PDF embedded font (sfnt) at offset 0x8429 4324 bytes