Malicious PDF — malware analysis report

Static analysis result for SHA-256 8be9b60b7b5980b6…

MALICIOUS

PDF

46.8 KB Created: 2020-08-03 15:38:32 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: d8676cf312b399c63e0168a212f5dbe6 SHA-1: 586c2e1c07d32d3e4d9c45a1dec381241ea0aef1 SHA-256: 8be9b60b7b5980b6193ea0552ef581b45026ad8ac064e08bee366d4eeede2904
152 Risk Score

Malware Insights

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

The PDF contains a critical heuristic firing for a malicious redirector link, directing users to 'https://ttraff.com/pify?keyword=mysteries+of+the+crystal+skulls+revealed+pdf'. The document body, though heavily obfuscated, also contains this URL and numerous other links to PDFs hosted on Shopify and other domains, suggesting a link farm or redirection strategy. The ML classifier also strongly flagged this PDF as malicious. The primary intent appears to be redirecting users to malicious infrastructure.

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.com/pify?keyword=mysteries+of+the+crystal+skulls+revealed+pdf
    • http://files.spolarandassociatesltd.com/uploads/1/3/1/4/131437246/ad1887fab21.pdf
    • http://files.paulandtashamassage.com/uploads/1/3/2/3/132302928/639da115.pdf
    • http://files.manchestercitytantricmassage.com/uploads/1/3/2/8/132815343/pifurikow.pdf
    • http://files.thescenevault.com/uploads/1/3/0/8/130814596/abb8db69300.pdf
    • https://cdn.shopify.com/s/files/1/0432/8800/2710/files/2579121880.pdf
    • https://cdn.shopify.com/s/files/1/0427/5575/2103/files/root_htc_desire_626s.pdf
    • https://cdn.shopify.com/s/files/1/0432/8990/3264/files/11194489263.pdf
    • https://cdn.shopify.com/s/files/1/0434/7835/2034/files/wubimox.pdf
    • https://cdn.shopify.com/s/files/1/0434/0878/5562/files/fufifofolokifemabapufovi.pdf
    • https://cdn.shopify.com/s/files/1/0429/7188/9815/files/5300348983.pdf
    • https://cdn.shopify.com/s/files/1/0431/5791/3754/files/8856256346.pdf
    • https://cdn.shopify.com/s/files/1/0431/8009/7702/files/mibinoxelika.pdf
    • https://cdn.shopify.com/s/files/1/0429/7372/4825/files/78370420549.pdf
    • https://cdn.shopify.com/s/files/1/0429/8558/6841/files/48290178299.pdf
    • https://cdn.shopify.com/s/files/1/0433/8361/9738/files/data_structures_and_algorithms_in_swift_raywenderlich_free.pdf
    • https://cdn.shopify.com/s/files/1/0429/1058/0903/files/1543577333.pdf
    • https://cdn.shopify.com/s/files/1/0434/0957/1990/files/hankison_air_dryer_maintenance_manual.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_off00006b0c.bin
82474ccb7cc2d312e3e20c4d9fc93ca6f8460216120869bb6657849b9c1b0ad5		 pdf-font-stream PDF embedded font (sfnt) at offset 0x6B0C 5252 bytes
font_01_sfnt_off00007d13.bin
cde066ae05015d547fbd4b555fe59fb9d20f036369c0ec4c27f89592ca634072		 pdf-font-stream PDF embedded font (sfnt) at offset 0x7D13 10096 bytes
font_02_sfnt_off00009fa2.bin
1062cd8ddf90f4344fa193b395386d5669df1a952e5759311ca261a71931f361		 pdf-font-stream PDF embedded font (sfnt) at offset 0x9FA2 4324 bytes

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