Malicious PDF — malware analysis report

Static analysis result for SHA-256 e3c11d576b634660…

MALICIOUS

PDF

39.9 KB Created: 2020-08-19 19:32:40 +03:00 Authoring application: wkhtmltopdf 0.12.5 (via Qt 4.8.7)
MD5: b4da22ba1af71c615ce1b08e2662ab9b SHA-1: 6232f31d843e930007a46f7d53126a5d68e7cf18 SHA-256: e3c11d576b6346605bd37cee508e302f972bc50c4d1998ac01c47d57bd9b7684
150 Risk Score

Malware Insights

MITRE ATT&CK
T1566.002 Phishing: Spearphishing Attachment T1059.001 Command and Scripting Interpreter: PowerShell T1204.002 Malicious Link: Malicious File

The PDF contains a link farm and a specific malicious redirector URL, indicating a phishing or redirection attempt. The document body text, though partially corrupted, includes the malicious URL and a lure related to blocking Facebook on Android. The ML classifier also flagged this PDF as malicious. The primary malicious IOC is the redirector URL, which likely leads to further malicious content or exploits.

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.ru/pify?keyword=block+facebook+on+chrome+android
    • http://gejuduwug.michelleconsidine.com/uploads/1/3/1/6/131606186/jefubusofise.pdf
    • https://cdn.shopify.com/s/files/1/0429/8568/5153/files/mavorokur.pdf
    • https://cdn.shopify.com/s/files/1/0438/6163/9318/files/gajagodaguvewemano.pdf
    • https://cdn.shopify.com/s/files/1/0438/8107/0747/files/real_mathematical_analysis_second_edition.pdf
    • https://cdn.shopify.com/s/files/1/0435/3484/4059/files/tetimedesedamigep.pdf
    • https://cdn.shopify.com/s/files/1/0433/4164/3928/files/copper_flotation_process_flowsheet.pdf
    • https://cdn.shopify.com/s/files/1/0431/2832/4257/files/18773445783.pdf
    • https://cdn.shopify.com/s/files/1/0427/8360/4903/files/xijuparodonexujoluwemuvik.pdf
    • https://cdn.shopify.com/s/files/1/0446/5026/6787/files/aeroelasticity_flutter.pdf
    • https://cdn.shopify.com/s/files/1/0431/9117/3278/files/basoxefejupifepugefolim.pdf
    • https://cdn.shopify.com/s/files/1/0431/3019/2039/files/customary_law_book.pdf
    • https://cdn.shopify.com/s/files/1/0431/7403/5607/files/datasheet_mosfet_irf630.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_off00005e5a.bin
4d64c3ee714b88ba48e414162ecab596e405e1a4be31c78e6e6e83c5d364a559		 pdf-font-stream PDF embedded font (sfnt) at offset 0x5E5A 5336 bytes
font_01_sfnt_off0000704f.bin
9b101997835bbfd7e275fdc37dc11a4d53cb6e34c99bcfc3b0f68b8e54f24c6e		 pdf-font-stream PDF embedded font (sfnt) at offset 0x704F 10204 bytes

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