Malicious PDF — malware analysis report

Static analysis result for SHA-256 867ab411814a60a5…

MALICIOUS

PDF

41.2 KB Created: 2020-08-26 01:48:18 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: 47e466485f992c383cae00acca3fd3d3 SHA-1: 28d07f6503c6d672cd5b886d5bbac3b72d91f6a1 SHA-256: 867ab411814a60a52d91d3000e18c6910d657fad16409c0c2066b681d408916b
154 Risk Score

Malware Insights

MITRE ATT&CK
T1566.001 Spearphishing Attachment

The PDF contains a large number of embedded links, many of which point to benign Shopify URLs, but one critical link directs to a known malicious redirector. The ML classifier also strongly indicated maliciousness. This suggests an attempt to lure users to malicious infrastructure, likely for further exploitation or phishing.

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=not+in+our+house
    • http://files.suncoastsoul.com/uploads/1/3/1/3/131379612/baretanemomimu.pdf
    • http://files.mrazfamilyfarms.org/uploads/1/3/1/6/131606150/b2df21ddc4a.pdf
    • http://kozujobo.witnessprism.com/uploads/1/3/2/7/132740228/42fc963.pdf
    • http://www.ascendercorp.com/
    • http://www.ascendercorp.com/typedesigners.html
    • https://cdn.shopify.com/s/files/1/0433/9928/2845/files/compendio_catecismo_de_la_iglesia_catolica_2020.pdf
    • https://cdn.shopify.com/s/files/1/0434/8664/2336/files/autoclave_diagram.pdf
    • https://cdn.shopify.com/s/files/1/0427/6187/9719/files/kufadivebowalerel.pdf
    • https://cdn.shopify.com/s/files/1/0432/2666/1023/files/isc_license_vs_mit.pdf
    • https://cdn.shopify.com/s/files/1/0435/4356/0346/files/first_law_of_thermodynamics_questions_and_answers.pdf
    • https://cdn.shopify.com/s/files/1/0430/0472/3349/files/17228906351.pdf
    • https://cdn.shopify.com/s/files/1/0437/8555/2034/files/bsi_iso_9001_logo.pdf
    • https://cdn.shopify.com/s/files/1/0437/2342/3912/files/mastering_the_art_of_french_cooking_chomikuj.pdf
    • https://cdn.shopify.com/s/files/1/0431/8996/0861/files/dupibazasesi.pdf
    • https://cdn.shopify.com/s/files/1/0436/4976/1433/files/gta_san_andreas_rom.pdf
    • https://cdn.shopify.com/s/files/1/0430/8870/7733/files/adding_mixed_numbers_with_regrouping_worksheets.pdf
    • https://cdn.shopify.com/s/files/1/0432/7797/5717/files/74903796205.pdf
    • https://cdn.shopify.com/s/files/1/0434/7353/5138/files/49912170277.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_off0000633a.bin
15f67cedeb8c67fa19c959a714442f8f40fdb082f01683a6a3a790eb573f0804
pdf-font-stream PDF embedded font (sfnt) at offset 0x633A 4500 bytes
font_01_sfnt_off0000727c.bin
fe94f10074637237fba02b9ac7b79ec7038d81b034edd55bc92749809870fff5
pdf-font-stream PDF embedded font (sfnt) at offset 0x727C 11048 bytes