Malicious PDF — malware analysis report

Static analysis result for SHA-256 2c18748df72d2943…

MALICIOUS

PDF

49.0 KB Created: 2020-08-11 17:15:46 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: fbe8bb6d57a917eb34a002f50d912f54 SHA-1: a0a805330194c0acda76b49916fa14b19cbe44f4 SHA-256: 2c18748df72d2943517aa47d8f5196489ac1f33b61810401d98f8d5ba30e1ff0
152 Risk Score

Malware Insights

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

The PDF contains a mass external link farm, with many links pointing to shopify.com, but one critical link redirects to a known malicious domain (ttraff.cc). The document body, though heavily obfuscated, contains the same malicious URL. This suggests the primary intent is to redirect the user to malicious infrastructure, likely for phishing or malware delivery.

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=california+dreaming+flute+solo+pdf
    • http://bazese.rainwaterfarmsny.com/uploads/1/3/1/6/131606027/99561c4f1c.pdf
    • http://lekesus.olimedics.com/uploads/1/3/1/4/131482975/2806037.pdf
    • http://files.dazmedia.net/uploads/1/3/0/7/130776498/2ec213be9bd83f.pdf
    • https://cdn.shopify.com/s/files/1/0433/0881/0398/files/bilix.pdf
    • https://cdn.shopify.com/s/files/1/0429/0628/8291/files/english_placement_test_with_answers.pdf
    • https://cdn.shopify.com/s/files/1/0435/4818/0634/files/javulasokas.pdf
    • https://cdn.shopify.com/s/files/1/0430/7792/7072/files/4767567769.pdf
    • https://cdn.shopify.com/s/files/1/0432/6018/2692/files/rajokuvonuz.pdf
    • https://cdn.shopify.com/s/files/1/0433/4754/2175/files/44868689897.pdf
    • https://cdn.shopify.com/s/files/1/0432/6031/3763/files/eccentric_and_concentric_reducer.pdf
    • https://cdn.shopify.com/s/files/1/0432/0778/6657/files/gobulovuvoxusuponeko.pdf
    • https://cdn.shopify.com/s/files/1/0438/1461/7250/files/gelufirekaxaravevo.pdf
    • https://cdn.shopify.com/s/files/1/0440/5719/8757/files/99403652301.pdf
    • https://cdn.shopify.com/s/files/1/0428/6778/5884/files/sukoviguwaduxigepebo.pdf
    • https://cdn.shopify.com/s/files/1/0436/2305/5523/files/hsc_math_textbook_download.pdf
    • https://cdn.shopify.com/s/files/1/0435/5093/3155/files/1993_chevy_s10.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_off00008184.bin
bf7dc2f4de377873cc000e512867affa37a37f48828c98ec4a9ad4f81daab41f
pdf-font-stream PDF embedded font (sfnt) at offset 0x8184 5268 bytes
font_01_sfnt_off00009354.bin
2aec5c2a7a1ee1dea0787bc81472296c6e675bd639f76aa560254a58439d4bd5
pdf-font-stream PDF embedded font (sfnt) at offset 0x9354 10308 bytes